Everything should be fully updated, it’s a freshly pulled repo and merged the latest upstream. Even refreshing the dependencies or just cloning the original GregTech6/gregtech6 repo didn’t help, so I still suspect there is something wrong in the build configuration, though I am not at all a gradle expert or even remotely proficient with it.
On a more positive note, I tested the testing release and reactors and moderation still works fine, so it seems I didn’t mess up and the small moderation spread issue should be fixed now.