Dropbox oAuth2 auth process fails with 400 Bad Request when call /oauth2/token
I have got the problem with my app. It worked fine for long time and now somethign happend. I can not understand what is wrong here. The problem is with oauth2 auth process. The first step works fine. I call https://www.dropbox.com/oauth2/authorize with my client_id, redirect_url (it is registered in the app). User…
