Hi Guys,

I have problem in opening my screen. Every time I click the menu item, it will shows error like this :

"Create connection failed. We recommend you view the technical details to obtain more information about this issue. If the problem persists, please contact your local IT correspondent."

I don't know what causes this, cause before, it still can be opened. But after I tried to add new button to the window, it shows the error like the above. 

I have tried to remove the button that I added before, but the error still won't go away. Help please?