APK error on visualize.js attempt

[email_registration_LUaZfV8]

We've just launched a copy of JRS via the AWS offering, and the basic operations work fine in browser, However, when we try to render them using visualize.js in android, we get nothing except a cryptic error from the remote browser debugger:

Uncaught TypeError: Cannot read property '2' of null

am using this visualize.js -->http://54.172.255.142:8080/jasperserver-pro/client/visualize.js

Pretty straightforward. We get nothing in the catalina.out nor jasperserver.log logs. We really don't have a clue why there's no response from the server. We do get the visualize.js page returned if we call it in the browser directly.or we have to use different visualize.js for android and ios 

Would someone point us in the right direction, please - even if just to tell us how to gather more information about the problem?

Thanks, saran