[TYPO3-dev] [Please check your network connection.] Can't access the backend.

[thomas macaigne]

Hi everyone.

I don't understand why, when connecting to the backend, I get this message:
"Sorry, but an error occurred while connecting to the server. Please check your network connection."

Here, a screenshot:

https://www.dropbox.com/s/70vi8b9my3whlx8/Screenshot%202014-06-06%2009.38.47.png

Can anyone tell me what I should do in order to troubleshot ?

The frontend is showing fine. Just the backend, right after the login form, produces this error.

Regards,