Same here. When downloading from git via the command line: git clone --recurse-submodule https://github.com/carekit-apple/WWDC21-RecoverApp.git I do receive the following error message in the output: git-lfs filter-process: git-lfs: command not found fatal: the remote end hung up unexpectedly Unable to checkout '0ad96d505c031cf2fc19eacd712dff7c46c71785' in submodule path 'ResearchKit'