Can't see configuration page, all is in blank

We are having a problem with the SSO & SAML authentication app. It does not load any type of configuration panel when you click it from the "Settings" menu

Steps to reproduce

1. Install SSO & SAML authentication app
2. Go Settings
3. Click in the app

Expected behaviour

You should see the app configuration to be able to work with it

Actual behaviour

Any type of configuration appears, only the title (name of the app) is seen at the top and everything else is blank.

SSO & SAML authentication app version
5.0.2 and 5.0.3 (we try both), download from the app store

Web server:
nginx/1.22.0

PHP version:
PHP 8.0.23 (cli) (built: Sep 1 2022 22:32:41) ( NTS )

Nextcloud version:
24.0.5

NextCloud Logs:
Every time we access the app, we get the following 3 errors in the log:

Error PHP Error: Trying to access array offset on value of type null at /var/www/html/custom_apps/user_saml/templates/admin.php#202

Error PHP Error: Undefined array key 0 at /var/www/html/custom_apps/user_saml/templates/admin.php#202

Error PHP Error: foreach() argument must be of type array|object, null given at /var/www/html/custom_apps/user_saml/lib/SAMLSettings.php#116

Reproduce the blank configuration page by installing the SSO & SAML app and opening it from Settings. Start with templates/admin.php at line 202 and lib/SAMLSettings.php at line 116, then compare the reported PHP errors with the configuration data being rendered. Done means the configuration panel appears without these errors.