Xcode code coverage uploads successfully but shows no report

I’m just getting started setting up codecov.io via CircleCI. It is running xcodebuild build test and then using the bash uploader to upload, and all I see is:

There was an error processing coverage reports.

No indication of what the error is. I’ve tried path fixing, running it locally and ensuring it produces a report output (it does). The logs show the upload succeeding. What could it be?

@circle-ci-tidepool, can you please provide a recent commit SHA and Codecov output of this?