Hi there Scarlet2325,
We understand you're looking for help addressing an error message on your Mac and linked to the support communities from the About system extensions and macOS page.
If you haven't yet, try isolating the behavior using safe mode. Booting your Mac in safe mode will prevent non-essential software from loading at startup. If you don't see the message while in that mode, it can help narrow down what type of software is causing the message. The following page explains how to boot in safe mode: Start up your Mac in safe mode
In addition to booting in safe mode, and letting us know the result, let us know whether any options appear in the message with the yellow triangle, like "Move to Trash" or "Show in Finder".
Cheers!