I have been using DocHub for almost two years with no issues. Now I can't login with Dropbox on ANY of my devices. I get a message "Unable to Authenticate." WTF?
We are still working on fixing the issue with Login with Dropbox and should have it resolved very soon. You can read more in our post about trouble logging in through Dropbox
We found that the issue is due to Dropbox deprecating it’s API version 1 and now requiring 3rd party sites like DocHub to update to v.2 in order to keep the integration working. Here’s a blog post on Dropbox’s website that explains some of the technical details about it: