PDF don't open after NC upgrade to 28.0.2

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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:


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Nextcloud version (eg, 20.0.5): 28.0.2
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04.3 LTS
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.52
PHP version (eg, 7.4): 8.1

The issue you are facing:
After upgrading to NC 28, I get multiple errors with ONLYOFFICE and Community_documentserver. Text files and Excel files work fine, but PDFs fail to get thumbnails and are not loading. Here is a common log entry for the error:

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. Upgrade to NC 28.0.2
  2. Open PDf file

The output of your Nextcloud log in Admin > Logging:
|Error|onlyoffice|ServerExceptionServer error: GET https://local_ip_/index.php/apps/documentserver_community/open/165454786//convert.jpeg resulted in a 500 Internal Server Error response: <hea (truncated…)

Failed to download thumbnail


Error index

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):


The output of your Apache/nginx/system log in /var/log/____:



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.


Ok. I worked around PDF display by switching OFF OnlyOffice tick next to PDF as preferred viewer, but I still have errors when trying to access PDF thumbnails. Strange enough thumbnail errors only apply to PDFs…

I have same problem , however it works on local environment which is span with Docker but not on AWS EC2

Server error: GET https://thecloud7.co.uk/index.php/apps/documentserver_community/open/2119620550//convert.jpeg resulted in a 500 Internal Server Error response: <head (truncated…)