I have version v1.17.6 (3ff35ad) and when I click on an attachment of a ticket I get error 500 the browser and the apache gives me the error [Tue May 06 18:55:44.515144 2025] [proxy_fcgi:error] [pid 6987] [client 192.168.123.245:52395] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Class "OAuth2ProviderBackend" not found in /var/www/html/serrano/include/plugins/auth-oauth2/auth.php:97\nStack trace:\n#0 /var/www/html/serrano/include/class.plugin.php(198): OAuth2Plugin->init()\n#1 /var/www/html/serrano/include/class.osticket.php(686): PluginManager->bootstrap()\n#2 /var/www/html/serrano/main.inc.php(34): osTicket::start()\n#3 /var/www/html/serrano/client.inc.php(21): require_once('...')\n#4 /var/www/html/serrano/file.php(17): require('...')\n#5 {main}\n thrown in /var/www/html/serrano/include/plugins/auth-oauth2/auth.php on line 97'
The Oauth2 Client works perfectly and sends emails,
but if I uninstall the Oauth2 Client everything works perfectly again


I don't know how to fix it, does anyone have an idea on how to fix it?