I have developed a custom for our organization with Appstudio 1.4. I ran through all steps purchased a develpeers license got Apple Developer subscription and also created all the certificates, provisioning and p12 files necessary to complete the make of this custom app. I got the zip files back from Appstudio with no issues. I was able to run the windows executable file on desktop and tablet with no issues but when I try to install the .IPA file format for IOS, I have issues even to install or run. I have tried doing the install using ITUNES on MacBook or IPAD and no success. I need some help to determine if its something to do with operating system upgrade on IOS or devices. Please help!!