Piwigo images upload ok, some thumbs but no image in gallery

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1

What app is this about, and its version: 16.4.0~ynh1
What YunoHost version are you running: 12.1.40.1
What type of hardware are you using: Old laptop or computer

Describe your issue

Hello

I wonder if anyone can help me, please?

I have been running a successful Piwigo instance for some time (6 years) with little or no trouble at all. I did a recent update to 16.4.0.

The site itself is working fine; however, yesterday I uploaded some new photos.

The progress bar completes, and I can then see the thumbnails in Global Mode, but the thumbnail is not available anywhere else, like single mode, and I certainly can’t see the final full-size image. All I see is a grey triangle or broken image icon.

Here is a demo.. It’s the CD Player image. Abstract & Effects | Del Jones Photography The image is in the carousel as a thumbnail.

If I FTP into the server, I can see the uploaded image, so it has uploaded; I can see a thumbnail in Global mode, but I can not see the image anywhere else.

I have no idea what has happened. I’m not a PHP expert, but I’m not afraid of using terminal… So any help would be appreciated.

I have thought about backing it all up, creating a new instance and re-uploading, starting from scratch, but I fear that the problem might follow.

Here is my current set-up:

Piwigo 16.4.0 Check for upgrade
Installed on 5 January 2022, 4 years 6 months ago
Operating system: Linux
PHP: 8.3.32 (Show info) [2026-07-06 06:33:14]
MySQL: 10.11.14-MariaDB-0+deb12u2 [2026-07-06 07:33:14]
Graphics Library: External ImageMagick 6.9.11-60
Cache size 2475.43 Mo calculated 7 hours ago Refresh

Activated plugin list12
About 1 menu
AlwaysShowMetadata
Colored Tags
Contact 1 menu
Contact Form
Exif View
LocalFiles Editor
OpenStreetMap
Perso About
Perso Footer
Piwigo Failed Login logger
Read Metadata

I have cleared/purged all the caches in maintenance. I have also disabled all of my plugins to see if that helps. I have also checked permissions.

Piwigo URL: https://derekjones.net

Many thanks in advance.

Derek

Share relevant logs or error messages

None. Yet

2

Can you check its ownership ?

3

@otm33 644. Folders are all 755. As they should be…

dj

4

yeah… but what is the ownership of the downloaded images ?

5

@otm33 oh right… If I download a faulty image, the permissions are for me to read and write.

It’s so odd this issue. I can upload an image, the image is in the right directory with the right permissions. I can see thumbnails of it all over the place in piwigo. I can download the image, but I just can’t see the image… It’s so frustrating as the rest of the images on the site are ok and it all behaves as it should. Grrrr…!!!

There have been a lot of PHP update lately. I wonder if something is wrong there?

Dj

6

Can you check nginx logs :
grep -r "20260706102625-305d52f3-me.jpg" /var/log/nginx
And check the if this file exists in uploads

7

@jarod5001 thanks for helping out….

So…. I did the: grep -r "20260706102625-305d52f3-me.jpg" /var/log/nginx

And Terminal went for a spin with a long output. I then did a search in the Piwigo uploads folder for 20260706102625-305d52f3-me.jpg, which returned nothing.

…but I have been cleaning up as this is a production site so I need to be careful how much “junk” I put up. I hope you don’t mind, but below is a step-by-step from scratch showing what goes on…

  1. upload an image (this is 1m, tiny… called daisy.jpg) The image is at: Abstract & Effects | Del Jones Photography

01_upload Medium
01_upload Medium640×360 21.7 KB

  1. The image thumbnail is available for editing

02_upload Medium
02_upload Medium439×640 29.7 KB

  1. Switch to the image properties view, and the image is broken.

03_properties Medium
03_properties Medium640×523 22.3 KB

  1. The image does not show in the gallery

04_gallery View Medium
04_gallery View Medium640×533 33.1 KB

  1. The thumbnail is in the gallery carousel…!

05_carouselView Medium
05_carouselView Medium430×640 28.8 KB

  1. I FTP’ed into the directory, and the image is there in its glorious full size…

06_in the UploadFolder Medium

It’s very odd. All other images prior to the recent update are fine, and the site works as it should.

I’m at a loss to understand. I have checked the permissions of the Piwigo files and folders, and they are as they should be. I have disabled all my plugins; I have been in maintenance and cleared the cache, run a database integrity test… everything I can think of.

Dj

8

I won’t be able to help a lot cause I don’t have the app installed and I don’t have my pc with me for a couple of days.
But check the browser console for errors. You’ll find probably a 404 error.
Run tail - 50 /var/log/nginx/derekjones.net-error.log to see what errors in the logs (you may open a broken image to trigger the error just before running the command)
You can also use the find command to search for the file inside /var/www/app and /home/yunohost.app/app to see if the file is in the correct location.
And check the ownership of the file, for php apps, it should be www-data:app (app is the id of the app)
Hope you’ll get it fixed

9

@jarod5001 No worries… thanks very much for your time..

I appreciate it

dj