I couldn't find a related discussion on here that wasn't 5-8 years old, so I'm submitting it to the forum for help. :-) I need to connect to a SQL database, and read and write to the DB from my app. Since this is personal health data from a healthcare organization, I will need to implement a secure form of data transfer - point to point encryption, or whatever the best practice is for this. I can't find much on this topic. Many apps connect to hospital data, but I can't find how it is being done from iOS. Basically, how is this being done? what's the basic architecture, and lastly might there be a current tutorial on these topics? Thank you in advance! Not sure if the tag I chose is the correct one for this topic.

This seems like an age-old error that I've never found the answer to. I created a simple app with a button that changes a text field for a demonstration of the TestFlight app and have never gotten the internal test to work. Created another simple app. Still can't download the app in TF. I've tried just about everything, but when I choose install in the TF app I get the error. I'm the only person listed in App Store Connect as a developer, so I chose myself as the only internal tester in the group. I've tried various builds also. In TF under app details it shows that my test apps will work on my phone. Everything seems in order when I push my archived apps from XCode to the App store. Showing up as Ready to test in the TestFlight section of the App store. I have no clue what to try next, other than moving on to external testers - which looks even more complicated to configure.