Manager server error

i got this error when i right clicked on tab i guess.

before i never faced this. now whenever i do right click i should go and restart the program from my server.

And what version is this? Based on the stacktrace, I just don’t see how this would be possible in newer versions.

this is 15.6.90 version

Check the latest version (15.7.4) to see if it makes any difference.

now its working perfectly
thank you