Symptom
Error message pop-up in browser.
One of the error message :
POLICY_GROUP_EHCACHE Cache : could not create disk store.
Initial cause was could not create cache directory "/var/opt/CSCOps/MDC/athena/csmweb/-1633782694"
Workaround
Workaround is to create a "csmweb" folder with casuser:casusers permissions and restart Tomcat:
root@fmc-73-1:~# mkdir /var/opt/CSCOpx/MDC/athena/csmweb
root@fmc-73-1:~# chown casuser:casusers /var/opt/CSCOpx/MDC/athena/csmweb
root@fmc-73-1:~# pmtool restartbyid Tomcat