Certbot - cannot snap-exec

I installed certbot with snap on Ubuntu 20.04.
It ran just fine up until now.

Running certbot gives cannot snap-exec: cannot exec "/snap/certbot/1043/bin/python3": no such file or directory.

The path links over several symbolic links to /snap/certbot/1043/usr/bin/python3.8 which is a file I can open.
But just running /snap/certbot/1043/usr/bin/python3.8 again gives no such file or directory.

Certbot log shows nothing. I don’t know if this is the right place to ask, also posted this on the certbot GitHub page.

snap list shows

Name. Version Rev Tracking Publisher Notes
certbot 1.13.0 1043 latest/stable certbot-eff✓ classic
core 16-2.49 10862 latest/stable canonical✓ core
core20 907 latest/stable canonical✓ broken
hello-world 29 latest/stable canonical✓ broken

UPDATE - As core20 is broken, could this be a bug in core20?