Internal Server Error on simpleid .well‐known openid‐configuration

On requesting the following url: /simpleid/.well-known/openid-configuration

I get Internal Server Error

Undefined array key 1

I am unable to troubleshoot further, the logs with debug severity shows pretty much nothing:

2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Base\IndexModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Store\DefaultStoreModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Auth\AuthModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Base\UserModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Base\MyModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Auth\PasswordAuthSchemeModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Auth\RememberMeAuthSchemeModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Auth\OTPAuthSchemeModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\OpenID\OpenIDModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\OpenID\Extensions\SRegOpenIDExtensionModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\OpenID\Extensions\PAPEOpenIDExtensionModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\WebFinger\WebFingerModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\Connect\ConnectModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\OAuth\OAuthModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\Connect\ConnectClientRegistrationModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Base\IndexModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Store\DefaultStoreModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Auth\AuthModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Base\UserModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Base\MyModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Auth\PasswordAuthSchemeModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Auth\RememberMeAuthSchemeModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Auth\OTPAuthSchemeModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\OpenID\OpenIDModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\OpenID\Extensions\SRegOpenIDExtensionModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\OpenID\Extensions\PAPEOpenIDExtensionModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\WebFinger\WebFingerModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\OAuth\OAuthModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\Connect\ConnectModule 2024-01-16 17:38:15 UTC [debug] SimpleID\ModuleManager->initModules: SimpleID\Protocols\Connect\ConnectClientRegistrationModule 2024-01-16 17:38:15 UTC [info] SimpleID\ModuleManager->loadModule: SimpleID\Protocols\OAuth\OAuthModule 2024-01-16 17:38:15 UTC [debug] SimpleID\Protocols\OAuth\OAuthManager->initAccessToken