Same issue. Just having a framework target with no dependencies and attempting to "embed and sign" it in the app target results in this error. Haven't found a workaround yet.

Old question, but I just ran into this myself so hopefully this helps someone else down the line. The problem is that you can't pass a CVarArg... argument to a function that takes a CVarArg... -- you need a variant that takes a CVaListPointer instead. More details here: https://stackoverflow.com/a/50942917/593170