I have a problem with plugins in osTicket version v1.17 RC. I'm testing the OAuth2 Plugin, but they don't want to load after logging into the website.
I have the plugins in the folder / path / to /osTicket/include/plugins
Phar should be enabled, as command below.
~$ php -i | grep phar
Registered PHP Streams => https, ftps, compress.zlib, php, file, glob, data, http, ftp, phar, zip
Phar-based phar archives => enabled
Tar-based phar archives => enabled
ZIP-based phar archives => enabled
phar.cache_list => no value => no value
phar.readonly => On => On
phar.require_hash => On => On