If you are attempting to open a resource on an iPad, and the program does not respond, it's likely because you have pop-ups disabled in your Safari browser settings. Pop-ups will need to be disabled in order to access these resources.

1. Launch the Settings app on your iPad. 

2. Select Safari from the settings menu.

3. Under General, you should see a Block Pop-ups option. Tap the toggle icon on the right so that it appears white instead of green. Green indicates the option is enabled.