When using Netskope on a Macintosh, an error occurs saving reports with the “Classic UI” that does not occur when using the most recent UI (Screenshot attached).  Disabling Netskope gets rid of the problem. There is anecdotal reports of someone having this same problem on a Windows/Edge combination.

I haven’t gathered enough data to create a Case with Netksope, so I wanted to see if anyone else has seen this phenomena.

A Google search reveals two mentions of this error, but both talk about browser security.  Both talk about Cross Site Forgery tokens.

Sometimes When Updating Records Browser Shows: Security Warning: Your submission token does not match session token - Support and Troubleshooting (servicenow.com)

"Your submission token does not match your session... - ServiceNow Community