Web app problem

I would like to know why my Web app cant runs the same way as ISO and Android. My variables can run properly in ISO and Android, but not on Web!!

I think, this causes becoz of web API and web APIs sometimes only work on phone(s) not on web, So, That might cause a problem and let your app crash and even I have a self experience on it.

once check the status of web API an if it says http request and something related to that, it means you can only preview on a phone, ok?