Is somebody has this error with Tomcat9: I ran into this error today after upgrading from Tomcat 9.0.91 to Tomcat 9.0.96 on a Windows Server. At the same time I updated our webapp (war-file) in Tomact.

In my case the problem was soved by deleting the old compiled jsp files in the tomcat/work/ directory. They were then compiled again and everyting was fine. But this is a special windows server where I often have problem with user rights - so I guess that the work-dir was from the tomcat-User and the new war-file from the local Administrator .. or something like that