Version 1.1.0 of jwt-authorizer includes token validation errors in the auth challenge which we need to debug GitLab-to-WMF-registry JWT auth failures (see T322453).
@Dzahn would you be able to build and import this version of the package for us? The main branch at https://gitlab.wikimedia.org/repos/releng/jwt-authorizer should be good to go and includes your prior fix to the control file. I hope the build goes smoother for you this time.