Security software blocking network

After upgrading to Big Sur, an upgrade for the security software (Symantec Endpoint Protection) was necessary. After the upgrade, all network traffic within Parallels was blocked. It seems Parallels and SEP do not play well together, possibly due to Big Sur's architecture, and this may extend to other security/antivirus software. Can Parallels investigate the root cause and issue a technical service bulletin for this? Big Sur (macOS 11.3) and SEP (14.3).

 

Hello, could you collect the tech report once the issue reproduced and post the report's ID here please?