cannot perform readlinkat() on the mount namespace file descriptor of the init process: Permission denied

Installed kernel 4.18 on my Ubuntu recently, since then snap packages broke with the following error.

It has something to do with the AppArmor exception rule for ptrace for what I could gather.

danesh@hades:$ spotify
cannot perform readlinkat() on the mount namespace file descriptor of the init process: Permission denied

The workaround for now is to upgrade your snap core to the beta channel.

danesh@hades:~/kernel$ sudo snap refresh --channel=beta core