After installing both Cisco AnyConnect version 4.9.x and Endpoint Protection 14.3 RU1 Mac Agent to macOS 11, the 'You are at Risk' pop-up occurs approximately every 10 minutes. When you click Finish Setup, you are prompted to Allow the Endpoint Protection agent to Filter Network Content again. After approving the network extension, the pop-ups continue to occur.
Both products require approval to filter network content which seems to lead to a condition causing the repeated pop-up from the Endpoint Protection product.
The Cisco AnyConnect product does not need to be connected, but just installed and present alongside the Endpoint Protection Mac agent. Both products need to have approval to Filter Network Content for this issue to occur.
Please open a support case referencing this document (206091) if you are experiencing this issue.