HTML5 build behaving badly on IOS phones

My HTML5 game works error free on android phones but, it is plagued with numerous issues on IOS. It keeps displaying an error (screenshot attached) and, the default orientation (landscape) on ios isn’t displaying properly. Please help.

The HTML5 builds are still in beta and haven’t been worked on for ages. There are plenty of issues like this that would need to be addressed, but until someone picks up the torch and resumes the work, there’s nothing else that you can do on a per project basis.