I think in other computer into the background, how should set it?

When I use another computer to enter the background, it returns a 403 Forbidden,how should I set to enter?

403 Forbidden

You do not have permissions to access this page.

I think in other computer into the background

WOW, mate, are you a robot ?

Can you try to reformulate your question ?

The problem is solved, thank you for your answer

Oh, background is backoffice maybe?

Ensure you're logged into the forum on the other computer.