Hey people outside,
my "Nextcloud Desktop" on Windows complains about the Let's Encrypt certificate of my Nextcloud Server. The Debian workstations don't have any problem.
I already renewed the certificate on the server, but still no success.
Also the expiration date of the shown certificate is different from all certificates in the Chain of the server (
Does anybody have a clue what could be the problem (except that it is Windows xD)?

In the certmgr.msc, I didn't find anything related to this server except for certificate for "DSR Root CA X3" which expired on 2021-09-30. I downloaded an updated list of root certificates with 'certutil.exe -generateSSTFromWU roots.sst' but there was no updated version.
For now, I imported the Server certificate itself into the certmanager.

I just switched from to certbot and now it works 🤔

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