An 'invalid_access_token' error like this should indicate that the access token the client is providing (in the "Authorization" header) is not valid. For instance, it is not an actual access token string, or the access token was revoked.
I am using an access token that I got from the logs. I don't think it was altered.
The error handling guide mentions that "Dropbox users may revoke API authorizations (as described here)". Will I get this error if a team admin account holder disconnects my app from their dropbox account?