Unity C# Gradle Build Failed

Question

I'm making a mobile 3D game called Ptaszory. I wanted to try to build the game for Android. I get errors. I have no clue what it means or what should I do.

The unity Version I'm using is: 2021.3.24f1

This is my External Tools setup:

My build settings:

My gradle and java: (not sure if this information is necessary here to solve the problem)

THE ERROR: 1.

`FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring project ':launcher'.

Could not resolve all artifacts for configuration ':launcher:classpath'. Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:aaptcompiler:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.lint:lint-gradle-api:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:gradle-api:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > androidx.databinding:databinding-compiler-common:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:common:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.build:manifest-merger:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.analytics-library:tracker:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdklib:27.0.1 > com.android.tools:repository:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 > com.android.tools.analytics-library:shared:27.0.1 > Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72. > Could not get resource 'https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.72/kotlin-stdlib-jdk8-1.3.72.pom'. > Could not GET 'https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.72/kotlin-stdlib-jdk8-1.3.72.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.ow2.asm:asm:7.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve org.ow2.asm:asm:7.0. > Could not get resource 'https://jcenter.bintray.com/org/ow2/asm/asm/7.0/asm-7.0.pom'. > Could not GET 'https://jcenter.bintray.com/org/ow2/asm/asm/7.0/asm-7.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.ow2.asm:asm-analysis:7.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > Could not resolve org.ow2.asm:asm-analysis:7.0. > Could not get resource 'https://jcenter.bintray.com/org/ow2/asm/asm-analysis/7.0/asm-analysis-7.0.pom'. > Could not GET 'https://jcenter.bintray.com/org/ow2/asm/asm-analysis/7.0/asm-analysis-7.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.ow2.asm:asm-commons:7.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve org.ow2.asm:asm-commons:7.0. > Could not get resource 'https://jcenter.bintray.com/org/ow2/asm/asm-commons/7.0/asm-commons-7.0.pom'. > Could not GET 'https://jcenter.bintray.com/org/ow2/asm/asm-commons/7.0/asm-commons-7.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.ow2.asm:asm-util:7.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve org.ow2.asm:asm-util:7.0. > Could not get resource 'https://jcenter.bintray.com/org/ow2/asm/asm-util/7.0/asm-util-7.0.pom'. > Could not GET 'https://jcenter.bintray.com/org/ow2/asm/asm-util/7.0/asm-util-7.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve net.sf.jopt-simple:jopt-simple:4.9. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve net.sf.jopt-simple:jopt-simple:4.9. > Could not get resource 'https://jcenter.bintray.com/net/sf/jopt-simple/jopt-simple/4.9/jopt-simple-4.9.pom'. > Could not HEAD 'https://jcenter.bintray.com/net/sf/jopt-simple/jopt-simple/4.9/jopt-simple-4.9.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve net.sf.proguard:proguard-gradle:6.0.3. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > Could not resolve net.sf.proguard:proguard-gradle:6.0.3. > Could not get resource 'https://jcenter.bintray.com/net/sf/proguard/proguard-gradle/6.0.3/proguard-gradle-6.0.3.pom'. > Could not GET 'https://jcenter.bintray.com/net/sf/proguard/proguard-gradle/6.0.3/proguard-gradle-6.0.3.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve com.google.protobuf:protobuf-java:3.10.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.analytics-library:protos:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.analytics-library:tracker:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:aaptcompiler:4.0.1 > com.android.tools.build:aapt2-proto:4.0.1-6197926 > Could not resolve com.google.protobuf:protobuf-java:3.10.0. > Could not get resource 'https://jcenter.bintray.com/com/google/protobuf/protobuf-java/3.10.0/protobuf-java-3.10.0.pom'. > Could not GET 'https://jcenter.bintray.com/com/google/protobuf/protobuf-java/3.10.0/protobuf-java-3.10.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve com.google.protobuf:protobuf-java-util:3.10.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > Could not resolve com.google.protobuf:protobuf-java-util:3.10.0. > Could not get resource 'https://jcenter.bintray.com/com/google/protobuf/protobuf-java-util/3.10.0/protobuf-java-util-3.10.0.pom'. > Could not GET 'https://jcenter.bintray.com/com/google/protobuf/protobuf-java-util/3.10.0/protobuf-java-util-3.10.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve com.google.crypto.tink:tink:1.3.0-rc2. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > Could not resolve com.google.crypto.tink:tink:1.3.0-rc2. > Could not get resource 'https://jcenter.bintray.com/com/google/crypto/tink/tink/1.3.0-rc2/tink-1.3.0-rc2.pom'. > Could not GET 'https://jcenter.bintray.com/com/google/crypto/tink/tink/1.3.0-rc2/tink-1.3.0-rc2.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve com.squareup:javawriter:2.5.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve com.squareup:javawriter:2.5.0. > Could not get resource 'https://jcenter.bintray.com/com/squareup/javawriter/2.5.0/javawriter-2.5.0.pom'. > Could not HEAD 'https://jcenter.bintray.com/com/squareup/javawriter/2.5.0/javawriter-2.5.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.bouncycastle:bcpkix-jdk15on:1.56. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.build:apkzlib:4.0.1 > Could not resolve org.bouncycastle:bcpkix-jdk15on:1.56. > Could not get resource 'https://jcenter.bintray.com/org/bouncycastle/bcpkix-jdk15on/1.56/bcpkix-jdk15on-1.56.pom'. > Could not GET 'https://jcenter.bintray.com/org/bouncycastle/bcpkix-jdk15on/1.56/bcpkix-jdk15on-1.56.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.bouncycastle:bcprov-jdk15on:1.56. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.build:apkzlib:4.0.1 > Could not resolve org.bouncycastle:bcprov-jdk15on:1.56. > Could not get resource 'https://jcenter.bintray.com/org/bouncycastle/bcprov-jdk15on/1.56/bcprov-jdk15on-1.56.pom'. > Could not GET 'https://jcenter.bintray.com/org/bouncycastle/bcprov-jdk15on/1.56/bcprov-jdk15on-1.56.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve org.ow2.asm:asm-tree:7.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve org.ow2.asm:asm-tree:7.0. > Could not get resource 'https://jcenter.bintray.com/org/ow2/asm/asm-tree/7.0/asm-tree-7.0.pom'. > Could not GET 'https://jcenter.bintray.com/org/ow2/asm/asm-tree/7.0/asm-tree-7.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve javax.inject:javax.inject:1. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 > Could not resolve javax.inject:javax.inject:1. > Could not get resource 'https://jcenter.bintray.com/javax/inject/javax.inject/1/javax.inject-1.pom'. > Could not HEAD 'https://jcenter.bintray.com/javax/inject/javax.inject/1/javax.inject-1.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve it.unimi.dsi:fastutil:7.2.0. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve it.unimi.dsi:fastutil:7.2.0. > Could not get resource 'https://jcenter.bintray.com/it/unimi/dsi/fastutil/7.2.0/fastutil-7.2.0.pom'. > Could not GET 'https://jcenter.bintray.com/it/unimi/dsi/fastutil/7.2.0/fastutil-7.2.0.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve com.googlecode.json-simple:json-simple:1.1. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > Could not resolve com.googlecode.json-simple:json-simple:1.1. > Could not get resource 'https://jcenter.bintray.com/com/googlecode/json-simple/json-simple/1.1/json-simple-1.1.pom'. > Could not GET 'https://jcenter.bintray.com/com/googlecode/json-simple/json-simple/1.1/json-simple-1.1.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Could not resolve com.google.guava:guava:28.1-jre. Required by: project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:aaptcompiler:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.analytics-library:crash:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.lint:lint-gradle-api:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:gradle-api:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > androidx.databinding:databinding-compiler-common:4.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:common:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools.analytics-library:tracker:27.0.1 project :launcher > com.android.tools.build:gradle:4.0.1 > com.android.tools.build:builder:4.0.1 > com.android.tools:sdk-common:27.0.1 > com.android.tools.analytics-library:shared:27.0.1 > Could not resolve com.google.guava:guava:28.1-jre. > Could not get resource 'https://jcenter.bintray.com/com/google/guava/guava/28.1-jre/guava-28.1-jre.pom'. > Could not GET 'https://jcenter.bintray.com/com/google/guava/guava/28.1-jre/guava-28.1-jre.pom'. > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderExcepti`

I tryied various versions of Gradle: 6.1.1, 8.2.1, 6.9.2.

Answer 1

Download and try Android SDKs through Android Studio. I had experienced the same issue and resolved it this way.