How To Enable Pop Ups on an iPad
Some web app links will not work properly on an iPad if pop ups are disabled. This quick and easy tutorial will show you how to enable pop ups.
Step 1: Open the settings app on the iPad.
Step 2: Once inside the settings app, scroll all the way down to the bottom on the left hand side, and tap "Apps."

Once you tap "Apps" search for "Safari", and tap the Safari icon.
Once you tap "Apps", you will want to once again scroll down until you find "Block Pop-ups". The toggle switch for this will likely be GREEN, and you will want it to be gray, which you can do by simply tapping the toggle switch.

After applying these settings, please do a RESTART of the device by pressing and holding the power button for a few seconds, and then power the device back on. The setting will then be applied, and should remediate any issues caused by this setting being enabled.