I saw mention in a mailing list message that a guice upgrade was introduced in a specific plugin and that may have caused startup issues. The Jenkins users mailing list "Upgraded Plugins: Jenkins fails to start" describes that the jacoco plugin upgraded to a newer version of the guice dependency and one user reported that a rollback was required for their environment.
lwiechec, could you review the recently updated plugins in your installation?
My installation of Jenkins 2.295 with the latest JaCoCo plugin does not show the problem with either Java 8 or Java 11, but that could be more of a happy accident than expected result.
Are you using the JaCoCo plugin and if so, what version?
Does the problem resolve itself if you downgrade to an older version of the JaCoCo plugin?
markewaitethe stacktrace says that then failure is caused by NPE in Git Pl;ugin.
Looking into it