Problem with OAuth 2

Hi guys.
Hi. I am trying to make a connection to another app (processmaker) using HTTP (Oauth 2). When I was creating the Ouath 2 application in processmaker, i used as a callback url. But when I try to make connection and after I approve in the processmaker app i get this error: {“message”:“The request failed due to failure of a previous request.”,“code”:“SC424”,“suberrors”:[{“message”:“Cannot read properties of null (reading ‘authorize’)”,“name”:“TypeError”}]}
How can i solve the problem?

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According to the Help Center,

The generic callback URLs should be

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