[ iOS Dropbox Core API Expired Access Token ]
I was getting Error Code 401, and it seems like my access token has expired. Dropbox reference says the following: "Access tokens may be disabled by the user (from the account page), revoked by Dropbox administrators in cases of abuse, or simply expire over time."
I have not disabled anything and I used to have proper access and upload files without any problem, so I assume the access token has expired. What should I do?
According to the docs you need to re-authenticate the user:
401 Bad or expired token. This can happen if the user or Dropbox revoked or expired an access token. To fix, you should re-authenticate the user.