I have been using Nextcloud for a long time to share files with external people and colleagues. The recipients install the official Nextcloud Files on their devices (PCs running Windows 10 & 11) and connect it to our Nextcloud server via our domain.
Until now, this worked well: The shared files/folders could be opened, read and edited directly in another program (shm profit) The app made the files available locally on their devices.
Since autumn 2025 (around October/November 2025), we have a serious problem with all newly shared files/folders:
The files are still visible in the Nextcloud Files app.
However, they can no longer be imported in the other program.
When I check the file properties/details in the app, the permissions only show “Special Permissions” (no normal Read/Write permissions are visible anymore).
Old shares created before autumn 2025 continue to work without any issues.
My environment:
Nextcloud Server version:Nextcloud 27.1.4
PHP version: 8.1.29
Nextcloud Files version: 33.0.1
System: Linux 3.10.0-1160.83.1.el7.x86_64 x86_64
Additional information:
The files are shared both as entire folders and as individual files – the problem occurs in both cases.
Our colleagues try to open the files with a program called Artikelimport.exe. The error message is: “The File xxxxx.csv cannot be opened”
We have not made any changes to the server (no updates, no changes to settings, etc.).
I have already tried the following:
Reinstalling the Nextcloud Files app
Renaming the files
Changing the share permissions to “Can edit” and allowing uploads
Checking all server sharing settings
The only thing that helped temporarily was a batch file that automatically grants full permissions to the local folder where the files are stored. However, this is not a permanent solution.
I can’t help but this version is looooooooong outdated and you probably won’t find anyone who is able to help you with that version anymore.
So as a first step go and update your server to at least NC32.x (most recent one is 33.0.1)
you should take care of updating this one as well… to 8.3 at least (better 8.4.) - take care of the requirements of the underlaying NC-version. Not every version deals with every PHP
apparently you didn’t.. which is really sad. Your data is at risk.
And apparently you DID change the client version. I simply don’t know if client 33.x works greatly with NC 27.x
a proper fix begins with a “supported” version which is not EOL since 2 years
We have updated now the Server version to Nextcloud 32.0.6 (latest available Version)
PHP version also got updated to 8.2.20
The problem still persists, it appears to be the same problem as shown in the video here:
As soon as we install Nextcloud on Client PCs and connect it to our domain it begins to freeze.
It won’t Sync files and eventually crash the explorer. If i click on the Icon in the Taskbar it only says: Syncronisation starting… but it is getting stuck (i assume thats why its freezing)
The Artikelimport.exe only needs the right to read the CSV Files shared by us
We have the files set to read only because many Clients recieve the same file, so we had to disable the right to edit them.
well… if this is really the same bug, we can’t do anything here since there should be a coded solution - and GH is the correct place for it. So I’m afraid the posted issue will “solve” your thread here.
A possible “workaround” might be going back to some 3.x Version when this bug didn’t appear. I’m not really sure if I read 3.11 would do it… but it was somewhere. Just try different versions to find out about.
The issue is the .sync-exclude.lst file. We manually created this file and shared it with all customers using the “Group Everyone” plugin, so that no temporary lock files are uploaded to the server (it can happen because a third party software can put *.LCK files in that directory when accessing the csv file).
However, since a Nextcloud update at the end of 2025, something has changed and this file can no longer be synchronized.
As a temporary workaround, we have installed an older Nextcloud Desktop version (3.17.1) on the customers devices.
Is there another way to create a global sync exclusion list for all users in Nextcloud?