My efile payment page is blank

There is something wrong with my Turbotax software:

 

1. At the top menu "File -> Sign in" -> blue "Sign in" button:  the pop up dialog box is blank. I can't see anything on the blank page, and so I can't login there.

 

2. At the efile process, click "pay with your credit card" blue button:

 (1). Again I got a blank page where I can't do anything to complete the credit card payment.

 (2). After I clicked here and there on the blank page (trying to see if I can bring up something meaningful shown up), a message pops up showing sth. like "You won't have another chance to do the purchase. Do you want to input the confirmation code before you leave from this page"?   So I dare not do anything further but leave the blank page alone, with the worry if I can still complete the credit card payment.

 

Could you please help with all of the above issues, so that I can use turbotax as usual and complete the efile process?

 

Thanks.