sorry for my English, I'm Spanish,
I have a problem with Google Drive authentication. This error message:
The Google Drive authentication could not go ahead, because something else on your site is breaking it. Try disabling your other plugins and switching to a default theme. (Specifically, you are looking for the component that sends output (most likely PHP warnings/errors) before the page begins. Turning off any debugging settings may also help).
I've checked everything and don´t know what can be. The log don´t tell me where is the problem.
Can you help me? thanks.