How can I delete an expired CA ?

Hello, I'm facing a problem on UTM 9 (las version). I can't delete a CA from the WebAdmin. The button isn't display, the icon of the CA isn't the same as the others. For exemple, ohters CA look...
[WARN-603] Let's Encrypt certificate renewal failed accessing Let's Encrypt service

I am getting this after doing some updates. It seems to be timing out. It is on Sophos UTM 9.720-5. It is a SG210. Any help or suggestions would be great or if you need some addition info let me know...