Adding Asset in Drools Business Central Workbench Fails

Question

I'm playing around with the KIE Business Central Workbench deployed in an air gap environment using their latest docker image. My hope is to leverage it to give my customers the ability to manage our rules logic (implemented in .drl files) themselves. I started a docker container created from an image I built using the image they provide above. Here's my Dockerfile:

FROM  quay.io/kiegroup/business-central-workbench:latest
COPY settings.xml /opt/jboss/.m2/settings.xml
USER root
RUN chown jboss:jboss  /opt/jboss/.m2/settings.xml
USER jboss

The settings.xml listed above contains a mirror to our locally hosted nexus repository. I added this due to requests in the logs going to maven central which always failed. I then exec'ed into the container and added a user with the admin role, then hit http://localhost:8080/business-central per the second link above. I then added a space, then a project with the space, then attempted to create new assets within the project. Adding any kind of asset yielded the following error:

Caused by: org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.default:artifact:jar:1.0.0
        at deployment.business-central.war//org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:282)
        at deployment.business-central.war//org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:198)
        at deployment.business-central.war//org.eclipse.aether.internal.impl.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:202)
        ... 101 more
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not transfer artifact org.default:artifact:pom:1.0.0 from/to (https://my.nexus.org/): Connection reset
        at deployment.business-central.war//org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:444)
        at deployment.business-central.war//org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
        at deployment.business-central.war//org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:223)
        at deployment.business-central.war//org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:267)
        ... 103 more
Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact org.default:artifact:pom:1.0.0 from/to (https://my.nexus.org/): Connection reset
        at deployment.business-central.war//org.eclipse.aether.connector.basic.ArtifactTransportListener.transferFailed(ArtifactTransportListener.java:43)
        at deployment.business-central.war//org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:355)
        at deployment.business-central.war//org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:67)
        at deployment.business-central.war//org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:581)
        at deployment.business-central.war//org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:249)
        at deployment.business-central.war//org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:520)
        at deployment.business-central.war//org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)
        ... 106 more

The name of this dependency (as well as its distinct absence of any artifact by that name here) makes me think this is some kind of KIE artifact which gets created on the fly. The only config change I made was to add the admin user via exec'ing into the container. I'm scratching my head as to why this doesn't seem to work out of the box. Any ideas?