Seems like your device credentials aren’t in the distribution certificate Expo has stored for you. You can try expo:build ios -c, which will clear the credentials used by Expo (not the orginal credentials in your Apple Developer Account).
first time it was with a distribution certificate for production, then with one for development (and another .mobileprovision) that included my iphone’s UDID. both failed with the same error
so what I’m getting from that article is that I should double check that the received provisional certificate was created using the received distribution certificate.p12
is there any problem that the account admin generates the files and hands them over to me for usage?