Unable to upload/sync some m4a, flv, mp4 files

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Just an unknown error from the client. No detail.
Nothing more in server log but I don't know exactly where we must look.

My problem:

I searched on the net and on the forum but I couldn’t find it. If I searched badly and my post is useless, I apologize but I did not find a solution to my problem even when trying solutions that solved relatively similar problems.

A few weeks/months ago I didn’t have this problem. but I don’t remember which event (system update, nextcloud update…) caused the problem.

I’m on Nextcloud v26 (the problem was already on the latest v25), PHP 8.2 and MariaDB. the installation is brand new, I started from scratch after getting tired of finding a solution on the original installation. but the problem is the same:
Unable to copy some files (network error, unknown error…). Extensions m4a - mp4 - flv for must.
these are mainly video files from the phone or recovered from the net but nothing to do, impossible to copy them to it either via the web interface or via a webdav client, whether under Linux, Windows or under Android. ; while they got copied long before.

I don’t know what to give you as other information but I can post if necessary.
I tested max filesize, max upload, bandwidth limits but without success.

I will be grateful for your help.

If you use the webinterface on your computer, can you upload such a media file? You might get more details on the server.
For the server logs, it can help just to look around the time/date when you tried this upload. There might be a lot of messages before/after.


Thanks for your help. And for the time to answer.

I think it’s related to PHP because, Tuesday there was an update and now some files sync again partially (the file upload to the server but with an error “cannot get files property’s” and file is not accessible with a video player) and some files don’t sync at all, as before, with the error “unknown error” or " not allowed".

My data are on a NFS share, but it was working as this since few years.

Here are errors message in the log, maybe related or not :
Could not predict suspiciousness: No models found"

*"Erreur *
Using ${var} in strings is deprecated, use {$var} instead at /var/www/NextCloud/apps/groupfolders/lib/Command/Scan.php#86"

*“Cannot load ZendOpcache, already loaded” *

“Unable to lock the file”

I try some things found on the web (modification on PHP.ini, config.php, nginx conf…) but nothing seems to solve the problem.

Thanks a lot in advance for any help.
Bests regards,


Sorry to come back so late.
The problem is still here and I don’t know what’s more to do to solve it.
Syncing of some files (principally flv, MP4, m4a but some other files like KeePass file too) don’t work et finally make an error as listed in previous post.

Please, have someone any ideas to help with this problem?
Thanks in advance for any help.

Bests regards,