This usually occurs when using of Laravel Socialite for authentication

Socialite

In addition to typical, form based authentication, Laravel also provides a simple, convenient way to authenticate with OAuth providers using Laravel Socialite. Socialite currently supports authentication with Facebook, Twitter, LinkedIn, Google, GitHub, GitLab, and Bitbucket.

Error

Argument 1 passed to Illuminate\Auth\SessionGuard::login() must implement interface Illuminate\Contracts\Auth\Authenticatable, null given, called in C:\xampp\htdocs\WrokSpace\professional\vendor\laravel\framework\src\Illuminate\Auth\AuthManager.php on line 297

Solution

Just delete the social provider assigned to that user id from your database table and that’s it.

Thankyou