Invalid_request, the connection was disabled

Probably a dumb question, but I just open an account at auth0 and I have a Default App with
Application Type: Regular web application
I disabled the database and I connected two Social Connections, facebook and vkontakte.
I provided the required settings and the valid urls on their websites.
However, when I try the two connections from the dashboard I get:

{
  "error": "invalid_request",
  "error_description": "the connection was disabled"
}

What can be the issue?

Same error also if I leave Auth0 dev keys.
Is the try connection feature working?

From my application it works correctly.
It’s just the ‘try connection’ from the dashboard that doesn’t work.
I consider the issue resolved as I don’t care of the dashboard.