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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 
iOS app version: 5.5.3
Nextcloud version (eg, 29.0.5): 29.0.4
Operating system and version (eg, Ubuntu 24.04): FreeBSD-14.1p3
Apache or nginx version (eg, Apache 2.4.25): 2.4.62
PHP version (eg, 8.3): 8.2.22
The issue you are facing:
Recently made photos are not auto uploaded from IOS app.
They are displayed as queued for upload (circle with square inside) but the upload is not happening.
It seems that toggling auto upload off → terminate app → open app → toggle auto upload ON makes the photo to dissapear in the app
then toggling “Upload all photos” ON is making them to be displayed again in the app and the upload starts but now it will take significantly more time than just uploading the files which were missing on the server.
I’ve also confirmed that manual upload is working fine (verified the files appeared on the server side).
Is this the first time you’ve seen this error? (Y/N):
No, I had the same issue at the begining of July. I was also performing similar steps back then. After uploading all the photos/movies confirmed the new one are getting detected and uploaded I had no re-visiting the nextcloud app since then. Now 9th of August I’ve found that last uploaded photos are from around 20 July and the rest is not uploaded yet (as described above).
Steps to replicate it:
- Make new photos and videos
- Open Nextcloud app after month or two
- Observe that new photos are not getting auto uploaded
The output of your Nextcloud log in Admin > Logging:
sem_get(): Failed for key 0x7ea: Function not implemented at /usr/local/www/nextcloud/lib/private/Preview/Generator.php#230
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.
PASTE HERE