Go to the Settings App
Scroll down to locate and tap on "Safari".
A new menu will appear (for iPad users, refer to the menu on the right side of the screen) and scroll down to locate "Block Pop-Ups".
Tap on the trigger button on the side and ensure it does not indicate any colour (grey).
You may now return to the Safari App to continue your transaction.
If you need to have this feature turned on again, repeat steps 1-4 and ensure that the trigger button is tapped again which should indicate a colour (blue/green, etc.)
(PACE/SP is not responsible for the quality and contents featured in the following video)