We're aware of a bug with Google Drive:

https://support.mixo.dj/t/google-drive-not-secure-error

I've subscribed you to the idea so you'll be notified when we've published a fix.

Could you send us a screenshot of your Dropbox issue?

We recently fixed a problem with Dropbox, but it's now working normally.

no admite iniciar sesion en google ni dropbox

Hi, this issue has now been fixed, please make sure to update

https://support.mixo.dj/t/google-drive-not-secure-error

If you have any other sync issues, please let us know.