Warning: Use of undefined constant OIDC_PATH - assumed 'OIDC_PATH' (this will throw an Error in a future version of PHP) in /gallery/plugins/OpenIdConnect/auth.php on line 21

Warning: require_once(OIDC_PATHoidc.php): failed to open stream: No such file or directory in /gallery/plugins/OpenIdConnect/auth.php on line 21

Fatal error: require_once(): Failed opening required 'OIDC_PATHoidc.php' (include_path='.:/usr/share/php7') in /gallery/plugins/OpenIdConnect/auth.php on line 21