I got this error after putting 3 new ACL rules into my switch today:
https://cdn.microtronix-tech.com/imgs/S ... -40-47.jpg

Its a CRS354-48G-4S+2Q+ running SwOS 2.16 like all my other ones. Once I put that ACL in it worked fine for about 20 min or so, then all of a sudden this comes up and it won't load the ACL page anymore. I've tried powering down and rebooting the switch, no deal. Thoughts?

I ended up temporarily fixing it by resending the javascript ajax call to post to the page, but with no ACL rules. I saved another ACL list on another switch the same model and copied its post payload.

So its obviously something wrong in the error checking code for SwOS. Anyone have any ideas?