You posted an EA fork here. You said you didn’t know why it does not compile. My compiler gives a clear message (see pic). Did you miss to include a library file in your post?
BTW: besides the error, there are 38 compiler warnings. Would be good to get rid of the, imo.
s.
A good trader is a realist who wants to grab a chunk from the body of a trend, leaving top- and bottom-fishing to people on an ego trip. (Dr. Alexander Elder)