@kyritrill Welcome to the Rockstor community.
Yes this error has been seen on occasions and is usually resolved by simply closing your browser / browser tab and starting a fresh session. At least on the occasions I’ve seen it. To properly sort we need a reproducer and to date we haven’t found one (it appears to be a rare and rather intermittent issue). See how the browser suggestion goes and if it sorts things for you. It seems that once the warning appears it’s sticky until your session is ended and a fresh one started.
Hope that helps.