Hi Cisco Community,
I have recently noticed that there is a bug with my version of Cisco ISE at 2.7 patch 4, where I get the following message when I am trying to check the syntax of one of my Downloadable ACLs:
I have a test ISE with 2.7 patch 4 and have no issues. When we originally went to 2.6, I had issues as the dACLs now supports IPv6. I had to recreate dACLs specifying IPv4 to get them to validate and work. old dACLs had the option to specify greyed out.
Those are Java errors referencing a lot of internal processes used by ISE. If you've already done the standard troubleshooting for client Java issues (cleared cache, tried another browser, reinstalled the latest version of Java, etc.), I would suggest opening a TAC case to investigate the issue further.