After upgrading Access Gateway Tomcat to release 9.0.96, accessing the ProxyUI web interface results in a 500 error.
Type Exception Report
Message An exception occurred processing [index.jsp] at line [1]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Note The full stack trace of the root cause is available in the server logs.
This is a defect in the 9.0.96 Tomcat release
Upgrade Tomcat to the 9.0.102 release. This KB article contains the files and instructions:
Vulnerabilities in Tomcat 9.0.98 and Older on Siteminder Access Gateway