Post-Xcodebuild script not found at ci_scripts/ci_post_xcodebuild.sh

Looks like your ci_scripts folder may be one level too high? It must be in the repository root.

I assume the ".sh" file extension is suppressed by default in the UI?

Also, check file perm on the script is correct and its added to the target that provides the scheme you are building against.

The default shell here is 'zsh' and I can't imagine that 'sh' isn't also available.

Sorry, were you able to upload your ipa using your .sh to firebase?, i have the same problem, the file is good but i can't upload the ipa.