Log hudson.pluginManager
This would help finding out what Jenkins does at start regarding plugins.
Bug: T361084
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
This would help finding out what Jenkins does at start regarding plugins.
Bug: T361084