First of all, I can’t find how to contact support.
I don’t have more clues, this is the entire relevant output
FAILURE: Build failed with an exception.
* What went wrong: Execution failed for task ':publishPlugins'. > Failed to post to server. Server responded with: Server side processing failed. Please email support with reference hash: 324daf
Failing code available here so maybe you can take a look and tell me what fails: https://github.com/albertonavarro/loggergenerator-gradle-plugin
My credentials are safe in my .gradle repo in my user folder, double checked.