Did it ever work? If so maybe try this from the apple support...
- Try a reset: Simultaneously hold down the Home and On buttons until the device shuts down. Ignore the off slider if it appears. Once shut down is complete, if it doesn't restart on it own, turn the device back on using the On button. In some cases it also helps to double click the Home button and close all apps from the tray before doing the reset.
- Try clearing the browser cache: Setting App > Safari > Clear Hostory and Clear Cookies adn Data.
Also, I don't have an iPad available but can you do this to get more info? https://mattvanderpol.com/2013/08/14/how-to-debug-javascript-or-css-on-ios/