Welcome to the Community!
You'll need to read the application's log file to see what the underlying error is, but it is very likely that you will find that it is a fatal error - your database is probably heavily damaged and unusable.
H2 is not a supported database for Atlassian stuff, it's only there for getting started with throwaway development, test or demo systems. If used heavily it will fail catastrophically, without warning.
You may be able to recover from a backup if you've taken one.
Whether you decide to try to recover or not is up to you, but you really should migrate to using a proper database as soon as possible, H2 will fail you if you carry on using it.
Hi, If you are running self-managed environments and looking to adopt modern infrastructure, Bamboo Data Center can now be deployed in a Kubernetes cluster. By leveraging Kubernetes, you can easily...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events