Please don’t submit an answer asking for a solution. I recommend creating a new question to get an answer and link to this question. Accompany it with any details you can give, like engine version, browser type/version (if relevant), the AV that catches it, and so forth. If you are using an older version of the engine, it may be worth attempting an upgrade on the project first. Be sure to backup the original before attempting the upgrade! Hope this helps.