Internal/server error - java.lang.OutOfMemoryError: Compressed class space exception

I have a system just updated with Ignition 7.9.10 and Sepasoft MES Production/OEE modules 2.9.3 SP9.
Furthermore, the same system with Ignition 7.9.5 and Sepasoft MES Production/OEE modules 2.9.3 SP7.
With regards to Sepasoft modules I have more than 50 lines working under them.
Memory dedicated to Ignition is 12 GB on both systems.

On both systems, recently, we started to have, sometimes, a few gateway pages not reachable with the gateway giving internal or server error.
Looking at the log it seems due to a “java.lang.OutOfMemoryError: Compressed class space” exception.

Any idea of what I could check ?

Thank you very much.


The rest of the stack trace of that error message would be more useful.