Don't do add your Widget with multiple scroll bar

 Today I tried to do a setup of my adsense account and noticed an interesting behaviour.

See the image below 

In the above image, you can view  responsive design option selection for configuring my adsense account

while adding the gadget I got an error saying, could not add a widget. I tried all the banner sizes and all throws the same error message.

I got confused on the exact error where it got failed. after multiple tried I noticed the scroll bar options in it.

While scrolling down, I got the error message saying, An Internal Error occurred, Please try again My bad

To view this error message, I need to use scroll down option in 1) browser scroll option. 2) popup scroll which is displaying in the image. 3) again inner scroll bar in the same image. 

Interesting design to use right :(