After using the blueocean plugin for a few days suddenly stops. I restart it and when I try to login I get either a stack trace or a resource not found tomcat error I believe (forgot to screenshot this).

I also get a jsessionid in the url all the time. Clearing cookies and trying t login again does not work. Using chromium as my default browser.

Then switched to firefox and tried loggin in: succes. I then deactivated all blueocean related plugins, the problem disappeared and I could then login again at chromium.