Missing required env variable: consumer_key

I try to extract tweets based on a #. So far, so good except that I can’t get the username of the person tweeting.
I think the problem is that the console says there is a problem with the consumer key.
You can see on screenshot what I say.

I tried to update my token, …

Important information : I have the academic research so I don’t think is a question of authorization

Thanks in advance for your responses

Other screen