src/PreviewDeck.cpp should be there.
try "ls src/ | grep PreviewDeck.cpp" this should give you an output if the PreviewDeck.cpp is src/ In case this fails update the branch and try again.
src/PreviewDeck.cpp should be there.
try "ls src/ | grep PreviewDeck.cpp" this should give you an output if the PreviewDeck.cpp is src/
In case this fails update the branch and try again.