I wanted to log in to the micro transmission point file with snap, but the error came suddenly. Baidu couldn’t find a solution.

Finally, I found a perfect solution on GitHub!!!

Just run the command. Note that you should use root permission!

systemctl enable --now apparmor.service

Note: if there is no AppArmor, use apt to install it!

Post the source of the solution:

https://github.com/ubuntu/microk8s/issues/249