this was probably already discussed, but I could not find my answer (that I understand).

All of the sudden on my admin page, there is no costumers and no orders, I mean, I can see the orders on dashboard, but cannot view or edit it. It says that the page does not exist.
Also, our costumers cannot login to the page. Like they don't exist (even if they create the new account).
I hope someone can help me. Pleaseee!

I have 2.0.1.1 version.