I was able to compile my .ipa but wasn't able to side load via AltStore. Have you ever experienced something like this?
Failed to verify code signature of /var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.TzxK7x/extracted/App.app/Frameworks/widevine_cdm_secured_ios.framework : 0xe8008015 (A valid provisioning profile for this executable was not found.)
My best bet it's somehow related to Xcode provisioning profile. I already checked my provisioning profiles which are AltStore based:
iOS Team Provisioning Profile: com.6433SS39U9.com.rileytestut.AltStore
iOS Team Provisioning Profile: com.6433SS39U9.com.rileytestut.AltStore.AltWidget
iOS Team Provisioning Profile: com.google.ios.youtube.6433SS39U9