I have a cloudron installation I forgot for quite some time. Now the certificate has expired months ago and I can't access the web interface. I couldn't find any guidance on how to renew the certificate via command line. Cloudron won't let me run the setup again and using certbot to manually renew proved very complicated due to Cloudron's custom cert storage scheme.
How can I fix that?
@svallory Accept self-signed certs and login to dashboard. Once logged in, I would first go to settings and check for updates/update all the way to Cloudron 6. This is because LE made a change in the last few months which makes cert renewal fail on Cloudron side. Once updated, Domains -> Renew all certs.