Since the Upgrade to Jira Core 8.9.0, Jira Software 8.9.0 and Jira Service Desk 4.9.0 the Jira Service Desk won't start anymore. All plugins stay disabled, even the Jira Workinghours. Tried to fix the issue in our staging environment, but even uninstall and delete of all entries of service desk in the database didn't fix the issue. Jira is running on a linux debian distribution. I also thought it might be issues with permission on the plugins, but even that didn't do the trick.
Plugins for service desk or workinghours not even showing up in the pluginstate table. Plugins are available on the server under installed-plugins. We also raised the waittime to load the plugins. But all 18 plugins for Service Desk won't be loaded.