Hello,
Since yesterday, the Windows desktop client app is not able to connect to my nextcloud that has a Letâs Encrypt certificate.
The web version using a browser is connecting fine without any error. I renewed the certificate without any issue. Chain looks correct in the browser.
The App displays this error :
Of course I can check the box stating that I trust this connection, but this is not what I want.
I am using the latest 3.3.4 version of the Windows app.
I am experiencing the same issue. Can you elaborate more on the reverse proxy that was the issue in your case? I do not have a reverse proxy but am still experiencing the issue. Also, if the issue were with a reverse proxy, why do browsers work and not complain about the Letâs Encrypt certificate?
The problem is about one of the Letâs Encrypt certificates that just expired (DST Root CA X3). It is a very impactful issue over many servers.
On windows, if this appear at launch, you can open certificate manager and delete the expired certificate, then relaunch your client.
How to :
I remember having to clean up the DST Root CA X3 on my pfSense box but wasnât aware it was in Windowsâ certificate store as well - looks like even Edge doesnât use the certificate store of Windows (or it tries different available certificate chains and the Nextcloud client doesnât).