Since upgrading from SDK23 to SDK24, and upgrading exp from 46.0.3 to 47.3.13:
‘exp build:ios’ now says
$ exp build:ios [exp] Checking if current build exists... [exp] No currently active or previous builds for this project. [exp] We do not have some credentials for you, provisioningProfile ? How would you like to upload your credentials?
I let Exp manage credentials before - have they been lost during the upgrade? (Project slug is still the same, I just added an infoPList entry for the Location permissions text).