Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): idk. cannot access currently. installed in May
Operating system and version (eg, Ubuntu 20.04): Win 10
Apache or nginx version (eg, Apache 2.4.25): ???
PHP version (eg, 7.4): not sure
The issue you are facing:
Hello community,
we are using a Nextcloud server provided by owncube. Today we had synchronisation problems with one notebook which was logged in with admin rights. While figuring out what I problem was, I have noticed that there is an update available . So I started the update, but it crashed. I think it got stuck at the point with synchronisation stuff. I’m sorry for not being able to provide more specific details, but at this point I didn’t know yet that this problem will actually become the real problem. So I figured out what the problem with the synchronisation was, but not I couldn’t log in anymore . Any attempts from any device failed. In the browser it just says:
"update in process ".
No matter what browser I use nor which device I use. When trying to log in with the desktop client, it shows "503 service unavailable " and that it cannot connect to the server .
I searched in the forum here but couldn’t find anything helpful, since I dont have enough information about the update process and I dont have enough IT knowledge. So I called the Nextcloud support, but they just redirected to this forum here and didnt want to help.
So is there any way that I can restart the update and fully conduct it? When I try to get to the point in the desktop client where I started the update, I fail to reach this point, since I cannot login anymore.
I’m very happy for any help since we cannot figure out how to resolve the problem with the update without have the Nextcloud support properly install the update for the server since they dont want to do this.
Kind regards,
Hannes
Is this the first time you’ve seen this error? (Y/N):
Yes