Attempt to read property "status" on null – Laravel

First time i try to log in in my website the website crash with error " status on null" , sometimes when i refresh it lets . I cant find the error.

public function authenticate()
{
        $this->ensureIsNotRateLimited();
        if (!Auth::attempt($this->only('email', 'password'), $this->boolean('remember'))) {
            RateLimiter::hit($this->throttleKey());
            throw ValidationException::withMessages([
                'email' => trans('auth.failed'),
            ]);
        }

        $user = $this->user();
        $customer = $user->customer;
        if ($customer->status !== CustomerStatus::Active->value) { 

            /*the problem is here*/
            Auth::guard('web')->logout();

            $this->session()->invalidate();
            $this->session()->regenerateToken();
            throw ValidationException::withMessages([
                'email' => 'Your account has been disabled',
            ]);
        }

        RateLimiter::clear($this->throttleKey());
    }

Here is the customer status,

enum CustomerStatus: string
{
    case Active = 'active';
    case Disabled = 'disabled';
}

There ary many errors like this in my project , i tried this :

if ($customer->status ?? '' !== CustomerStatus::Active->value)

But then I cant log in , all my accounts become disabled.