Problems with building native app

The following message is displayed every try building the native app for iOS of signed Android app (not signing works fine). Not sure what causes this. -I’m building through the native builder using App center -The same configuration (keystore file/iOS signing files ect.) have been used before to build previous versions of the app -native builder UI v. 1.0.86 building app for distribution -app center/github tokens/PATs are correct  
1 answers

Turns out there was a problem with the App center yaml that some how broke, not sure why. 

After creating a new app center build street and directed the config towards the new street, it once again worked