Hello, I have an issue where my LE certificate on the firewall updated, browser is showing the correct certificate, but the app under windows does not, and gives me untrusted certificate error. Nextcloud is running on the Ubuntu server. App is on windows. Both are the latest version: 22.1.1 and …

So I have resolved the issue, but it was made more confusing because all the browsers I tested access with whether internal and external, on PC or mobile, all showed the newer server certificate, but what the NC Windows client was actually showing was the LE intermediate CA certificate - it’s obviou…

Hi, i can confirm the same thing since today, on two different sites … Web is ok, Android App is ok, but the Win Client fails the connection due to a Certificate Validation error. But the error is popping for an LetsEncypt intermediate CA certficate which expired yesterday evening. Is the Win Clie…

I have the exact same issue on multiple systems, at first it was both internal and external accesses but I fixed the internal by updating the intermediate certificate for R3, but this hasn’t helped for external access so far but that could be because it’s using the firewall’s own copy of the certifi…

I found this for you: DST Root CA X3 Expiration (September 2021) - Let's Encrypt Let's Encrypt's Root Certificate is expiring! But sorry i have got no solution for your problem. Found also this: Let's Encrypt DST Root CA X3 expiry Sept 30th 2021 | Certify The Web Docs Windows PC On windows PC…

[image] Taomyn: the firewall’s own copy of the certificates as it’s going through HAProxy whereas internal it’s direct to the Nextcloud server. So check with the firewall, how to update certificates there. Does it just cache the certificates? Perhaps they have tutorials like they did for pfse…

I have the same issue. I solve the problem like this: close app nexcloud on your PC and from default browser (edge/chrome/firefox/etc) enter on this site https://valid-isrgrootx1.letsencrypt.org/ . It works.

This is a bug in the NextCloud Windows client: ISRG Root X1 Certificate not trusted · Issue #3858 · nextcloud/desktop · GitHub They are working on a fix right now.

Hello, I’m having the same issue. I moved my reverse proxy on unraid from SWAG (which had no certificate problem) to Nginx Proxy Manager. I am using Lets Encrypt for my domain nextcloud.server.com and it works great on all browsers, but not the desktop apps. I get the same error you mentioned. I…

This did the trick, thank you so much! Could you please explain as to why this is working? This doesn’t make any sense to me.

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Nextcloud App untrusted certificate, OK in browser

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