SOLVED!
Go to Build Settings > Search for "bitcode" > Turn Enable Bitcode to No
This will fix it. Also, if you are apprehensive about disabling bitcode, don't worry. Apple describes bitcode as follows:
Bitcode is an intermediate representation of a compiled program. Apps
you upload to iTunes Connect that contain bitcode will be compiled and
linked on the App Store. Including bitcode will allow Apple to
re-optimize your app binary in the future without the need to submit a
new version of your app to the store.
You don't really need to enable it. Read more about bitcode here.
That's it.
Your build should go through now.
