Laravel belongsTo via pivot table?

Question

Laravel

public  function referralTo()
    {
        $isReferraled = UserReferral::where('referral_id', $this->id)->first()->inviter;
            return $isReferraled;
    }

Will give an error:

Relationship method must return an object of type Illuminate\Database\Eloquent\Relations\Relation

Therefore, it is necessary to somehow pull out the user who invited the current one in a standard way. Communication goes one to one, and it is necessary to use the intermediate table. Now I have it as a table of the UserReferrals model, I specifically made it as a model, for the example above, alas, it did not work.
How to use pivot table when Laravel ORM belongsTo?

Answer 1

"Relationship method must return an object of type Illuminate\Database\Eloquent\Relations\Relation"
Have you read this at all? Where do you have a relationship method in that code? In one single place: ->inviter.
Relationship method must RETURN - this is required from the method, and therefore from you. Where is the method? In the UserReferral model, where else could it be. Show the inviter method code from this model.
Is it really so difficult to follow what is required of you in plain text. Moreover, the 100% stacktrace even indicates a specific place, and with the new laravel 5.5 whoops, the code is also there ..