iPhone qr scanner app code troubleshoot

I have a scanner app that connects to an api and the app works, but not fully. The process is, scan a qr code, then the api requires authentication which is a password, after inputting this info, the results of the scan will be visible. Also, once on the view page, you can execute other functions that the api offers. This process can be done actually on any scanner app, but with limited functions. The issue is that my app has a small bug that it wont connect properly when doing a scan and thus it wont go any further. Since you can view the results on any scanner app from the app store, my app should also work the same way, the results is a "web view" that you can see on any mobile browsers. The idea for my app is to show this "web view" into the app itself so as to not utilize a mobile browser. The work itself should not take more than 2 or 3hrs to troubleshoot and fix, I need a solution asap.