Got it resolved.
For some sites it does not allow that use the codes like “eval()” directly due to CSP configuration. But after checking the codes from my app, I found out the index file is using this logic to check if the current Browser is supported:
I am not sure if this is originally written by Mendix app default? As I just downloaded from App Store and then customized it. This may not appropriate for those platforms which having this limitations on...