fix iOS app download

I have iOS application which have to be downloaded and installed on iPhone. Download page is written with angular (FE) and java (BE). There's some bug in java code and instalation can not start. I'm looking for someone who know what is doing to fix java code. I'll provide all needed (current .html, manifest.plist, .ipa file and java code).

Used methods are getIosManifest() and downloadIosApp(String version). Link I'll provide later.