Hello. After upgrading from 1.31 to 1.33.1, I was unable to upload pdf files to my mediawiki. I get the following error when trying to run update.php from MaintenanceShell:
https://pastebin.com/nLActyLy
Currently running :
*PHP 7.2.29-2007
*Mediawiki 1.33.1-0136
*MariaDB 10.3.21-0063
Feel free to ask any questions, I will try to answer to the best of my ability. Thank you!