Changes in the login process
The service we were using to log in with Facebook, Google and Yahoo was only available until February 4 2019 and is already shut down. This is why these options are no longer available on the Sign In page.
In order to keep access and the ownership of your data in SharePoint, please register at SWITCH edu-ID, using exactly the same email address you were using before. Only then will you retain your access rights and documents ownership.