TopComponent causing project not to build in Netbeans 12.6, reoccurring error : Return code is: 501 , ReasonPhrase:HTTPS Required

Question

I have a project (written in Java using the Netbeans Platform 12.6), which is composed by several Tabs (all of them are created subclassing the TopComponent class). The project is neither cleaning nor building and I keep getting this error:

'COMPILATION ERROR : 
 <hr>
com//ProgramTopComponent.java:[40,13] error: 
Could not generate files: java.io.FileNotFoundException:
C:\\Program-module\\program\module\Bundle.properties (Access is denied)
<hr>

'BUILD FAILURE
<hr>
Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile 
(default-compile) on project Program-module: 
Compilation failure:
com//program/module/ProgramTopComponent.java:[40,13] 
error: Could not generate files:
java.io.FileNotFoundException: 
C:\\\Program\Program-module\\\\\program\module\Bundle.properties (Access is denied)
To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.

 For more information about the errors and possible solutions, please read the following        articles:
cwiki.apache.org/confluence/display/MAVEN/MojoFailureException'

In Command Prompt I get:

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BUILD FAILURE

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Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for:
org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.4.1 from/to central (//repo.maven.apache.org/maven2): Failed to transfer file:
/repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.4.1/ maven-clean-plugin-2.4.1.pom. Return code is: 501 , ReasonPhrase:HTTPS Required.

 To see the full stack trace of the errors, re-run Maven with the -e switch.
 Re-run Maven using the -X switch to enable full debug logging.
 
 For more information about the errors and possible solutions, 
 please read the following articles:
 cwiki.apache.org//confluence//display//MAVEN//PluginResolutionException

With the -X trace enabled when cleaning in CMD

---

BUILD FAILURE

---

Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for: org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1: Could not transfer artifact: Failed to read artifact descriptor for: org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1 ... Caused by: org.sonatype.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for: org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1 ... Failed to transfer file: "repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/ 2.4.1/maven-clean-plugin-2.4.1.pom. Return code is: 501 , ReasonPhrase:HTTPS Required.

TLDR: it's giving me the ERROR 501 = ReasonPhrase:HTTPS Required. but I've Ctrl-F'ed the entire file project and I can't find any instance where http is called where it should be https.

What is causing this hang?

I have gone through all of the .pom files, settings files, manifest files and .config files associated with this program to make sure that all http declarations are https. Additionally, I have wiped out generated build files and built again. I have manually gone and pulled the associated dependencies from the central Maven repository.

I'm really hoping I'm just doing something terribly stupid and overlooking a simple thing. Has anyone else run into this?

settings.xml has already been updated to point to the updated repository

I have already explicitly declared the repository in my .pom file