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Twitter login error

I’m trying to activate the twitter login on my app and I get the following error from twitter during the login process:
Error connecting to Twitter: “Request token missing”

From bubble side my setup is correct, consumer key and secret are in. From Twitter side also it seems to be correct, I followed some recent tutorials (https://youtu.be/1eDdPzS0G8E), I followed all instructions from twitter and got the “elevated access” granted to my app.

Has anyone experienced this error? Any solutions?