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
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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): Nextcloud 26.0.4 Enterprise
Operating system and version (eg, Ubuntu 20.04): -
Apache or nginx version (eg, Apache 2.4.25): -
PHP version (eg, 7.4): -
The issue you are facing:
If the internet connection is unstable, the error “Unknown error” appears when uploading files. What are the options for solving the error, not from the client or provider side, but from the Cloud admin side?
Is this the first time you’ve seen this error? (Y/N):N
Steps to replicate it:
Test case 1
Connect via VPN.
Open Cloud.
Select some files to download and start the download. A download progress bar will appear from the cloud
Close VPN connection.
The error occurs
Test case 2
Open Cloud.
Select some files to download and start the download. A download progress bar will appear from the cloud
Turn the LAN cable off and on to simulate a broken Internet connection
