Support intro
Sorry to hear you’re facing problems 
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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, 29.0.5): desktop version 3.4.2 Operating system and version _(eg, Ubuntu 24.04)_: Ubuntu 22.04 4
The issue you are facing:
I am using Nextcloud desktop client from two computers with the same configuration. In one of them, most of the time I create or modify a file, it gives a sync error directly on Nextcloud. But if I close and open back the app, it works again, with everything synchronised. However, this problem doesn’t occur on the other computer with the same configuration.
Could anyone help me?
I don’t know where to find the log. There is nothing related to Nextcloud on /var/www
Cheers
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
- Create a new file
- Modify it a few times
- Wait
The output of your Nextcloud log in Admin > Logging:
I can't find the "Admin" file
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
PASTE HERE
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
Nothing related to nextcloud in /var/www