Error when cloning repo

[jtmilne]

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree submodule update --init --recursive PPiAwesomeButton
No submodule mapping found in .gitmodules for path 'PPiAwesomeButton-Demo/Pods/ FontAwesome+iOS'
Failed to recurse into submodule path 'PPiAwesomeButton'
Completed with errors, see above