Please upgrade gerrit to 2.12.
Following plugins needs to be tested and fixed in the new version (and blocks an upgrade):
its-phabricator 2.8.1 Enabled its-phabricator-from-bugzilla 2.8.1 Enabled github-create-1.0-rc0 1.0-rc0 Enabled deleteproject 2.8.1 Enabled
Release notes for 2.12 are at https://gerrit-documentation.storage.googleapis.com/ReleaseNotes/ReleaseNotes-2.12.html
See Also: T65847