KevinTheJedi When attempting this fix I am getting a 500 error after refreshing the webpage. Just want to make sure that im supposed to replace what was previously in that section of uaoth2.php with what you've provided?
Reverting the changes back in the _plugin table immediately lets me load the helpdesk. Gotta be something wrong with my oauth2.php im guessing.

osTicket Version v1.18 (724de45)
Web Server Software Apache/2.4.41 (Ubuntu)
MySQL Version 8.0.39
PHP Version 8.1.22

Edit: Fixed this by downloading a fresh phar and redoing the process! Now just getting AUTHENTICATE failed when saving. So going to read further up as I'm pretty sure this was mentioned before

Edit2: I'm just going to take a nap. I spelled the email wrong when I tried deleting and recreating. All is working now. Thanks as always!

    First of all, thank you @KevinTheJedi for being an absolute legend. Was able to get our system fixed thanks to your speedy resolution.

    Second, just wanted to share that you can use Phar => zip converters and make the adjustments on a local client machine if need be. That's what I did and FTP'ed the updated files to the server.

      ElbowNi

      Leave it extracted and update the database. You don’t know if you repackaged it correctly and it could still have issues. Although if you were able to get a token it should be fine. Also you would need to make sure you logged in as the email itself (using incognito window). You also need to make sure fetching is enabled globally and that you have a valid running cron job/scheduled task. Lastly check your system logs for any related errors.

      Cheers.

          KevinTheJedi
          Cheers for getting back, I did notice the Green Token is just expiring, rather than renewing also the cron job is getting this syslog error
          CRON[8181]: (osticket) CMD (php /var/www/html/osticket/api/cron.php)
          CRON[8180]: (CRON) info (No MTA installed, discarding output)

              ElbowNi

              That means you likely used wrong account when it brought you to MS to authenticate. Login and authorize as the email you are configuring in osTicket.

              Cheers.

                KevinTheJedi "set the install_path to plugins/auth-oauth2 (just remove the .phar)" maybe i did something wrong here... can you tell me all the commands please? and what i need to do? i'm not an expert of mysql

                    Gian2003k

                    If you don't know how to run SQL queries then you should use a database GUI like HeidiSQL (windows) or SequelAce (mac). If you can't do that then you should simply wait for the new build of plugin to be released. Or follow the above instructions from @ElbowNi to repackage so you don't have to mess with db.

                    Cheers.

                        Gian2003k you can use following commands to do that:

                        change for, if the plugin is a dir:
                        UPDATE ost_plugin SET install_path = 'plugins/auth-oauth2', isphar = '0' WHERE install_path LIKE 'plugins/auth-oauth2%';
                        change for, if the plugin is a phar file:
                        UPDATE ost_plugin SET install_path = 'plugins/auth-oauth2.phar', isphar = '1' WHERE install_path LIKE 'plugins/auth-oauth2%';

                        I hope, it helps you to do the task.

                            jens_E I'm still getting this: array ( 'code' => 'Gone', 'message' => 'The API version \'V2\' has been deprecated.', )

                              @Gian2003k Did you unpack the plugin and make the changes from #41 above?
                              You have to unpack the phar and make the changes and upload the changed files

                                jens_E Yeah, i edited the oauth2.php file with the changes under OAuth2AuthBackend

                                  jens_E I did everything and the plugin is installed but when i try to configure the authentication i get this:

                                      Gian2003k
                                      Are you logged in?
                                      Please look at your php error log. It seems you get a php 500 error. Look at your modified code, if you have a typing error...