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
humblehacker
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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.