Cant access sandbox.paypal.com website

i created a sandbox test account from developper.paypal.com to test purchases from my website but i cannot seem to access the sandbox.paypal.com website. An error message page appears:

This site can’t be reached

http://ift.tt/U9tsBr unexpectedly closed the connection.

ERR_CONNECTION_CLOSED

I searched everywhere and cannot find an anwser...

and also, the same message appears when i try to access the "Report a bug or issue" from the PayPal Technical Support on the developper.paypal.com website.

So i cant even contact them to see whats the problem

any help is appreciated, thx!