MismatchingRedirectURIError('(invalid_request) Mismatching redirect URI. <oauthlib.Request SANITIZED>

Hi all,
Can someone help me see where is the mistake on this call ?

https://demo12.angolaerp.co.ao/api/method/frappe.integrations.oauth2.authorize?scope=all+openid&response_type=code&redirect_uri=https%3A%2F%2Fdemo12.angolaerp.co.ao%2Foauth2%2Fcallback%2F&client_id=4dcfbb7ff1

It is returning

MismatchingRedirectURIError(’(invalid_request) Mismatching redirect URI. <oauthlib.Request SANITIZED>

I have also copied the link from this OAuth2 Mismatching redirect URI and changed the main address and client_id to mine and still the same error.

Wondering if the version of the OAuth (0.7.3) using on ERPNext V12 lib has anything to do!