iOS Test flight error due to code signing issue

Question

I am trying to submit a build to test flight but I am keep on getting this error saying my app is not signed. However, I have added the right team and signing certificate thus I have no idea why I am getting such an error.

I did some googleing, looking up on stackoverflow and flip around some settings, however, I am still not able to get the desired result. :(

Any help would be appreciated!!

Answer 1

As discussed in the comments, You are getting this error because you've code signed your app with development certificate. You're supposed to use a distribution certificate for releasing the test flight.

For creating a distribution certificate, I suggest you the follow the steps listed here