After upgrading Bitbucket Git X-Modules does not load

we upgraded our Bitbucket to version from 7.17.2 to 7.21.10 and after upgrade git x-modules plugin does not load - I cannot load global configuration page or project/repository page - browser keeps calling /rest/gx/1.0/scheduler/query. Plugin version is 1.0.3-rc2-30.ff423a7.
Is there anything we can do? Can you help us with this problem?