This tip is copied from the ESET support service.
Hello,
Please review the following information from ESET:
https://support.eset.com/en/alert7666-eset-support-of-macos-big-sur-11
Then Download from Link and install :
https://www.eset.com/int/home/cyber-security/download/
Warning. An issue remains as the fix last only for the running session and have to reinstalled each time you switch it on or reboot.
A new fix may come soon.
Denis