Since nobody here can see your coding, neither on the server nor in the app, I don't think anybody here can help. That's why I removed the links from your post.
I suggest finding a local web-/app development company to solve your issues or even make a new app with tools they know in stead of the tool selected by you.
I have a website rent4free.com, so for mobile app I converted mobile browser website to app using Itsapptoyou.com . Mobile app is created but it is effecting the CSS and other design in app. Photos are not uploading in our app only. But in web browser everything is fine. We are facing issues in app only.
I want to know whether it is a problem in our app or coding. Our front end is in PHP.