Problem Loading Page

This morning, I logged in to AE.

Almost half of the page I visited displayed this notice.

PROBLEM LOADING PAGE

The other pages i clicked loaded successfully, but after 2-5 seconds the screen changed automatically then displays this notice.

PROBLEM LOADING PAGE

I wonder, because the page have loaded successfully, then it changed the display to PROBLEM LOADING PAGE.

So I have to Reload The Tab or RESEND once or twice even thrice, then the page becomes successful.

Hmmmm....

I have not experienced it in the past.

Just today.

I virus scanned my computer.

I updated the Firefox today.

I refreshed the Firefox today.

I updated my Windows today.

I restarted my computer.

I used another computer.

The same problem.

So what might be the problem?

It is only happening in AE but in other websites, its not.