We recently bumped Ruby to 3.3, and since you are on 3.2.1, the plugin is pinned to an older commit for compatibility reasons. In this commit, the extra gems the plugin needs are incompatible with 3.3.
Discourse 3.3 is around the corner, and it should fix the issue, but I didn’t want to leave you folks hanging or force you to start following beta/tests-passed. I’m pinning the plugin to a commit that is Ruby 3.3 compatible:
Please let me know if you still experience errors during rebuild.