Hi @leeflannery,
i agree with you, the error message is not the best.
Previously xamarin were putting the .ipa file into the project defined (OutputPath) directory inside a timestamped directory, like:
PROJECT_DIR/iOS/bin/iPhone/Release/Multiplatform.iOS 2017-02-06 13-59-21/Multiplatform.iOS.ipa
and the step was prepared to handle this kind of ipa path. To determine the latest generated ipa, the step sorts this paths.
This behaviour changed in xamarin and the timestamped subdirectory were removed, see more: Xamarin iOS ipa path is not exported on the beta channel
Reflecting to these changes we updated the step (1.3.1 -> 1.3.2), however it seems the logic, which determines if we should sort tha ipa path or not is not correct, thats why you got Failed to collect output, error: Path is not sortable:..., the step should not try to sort this kind of ipa path.
We will fix this issue ASAP.
May i ask you, what is your ios project’s Output path, you can find it in your ios Project Options/Build/Output/Output path?