@George, I encountered some additional errors while trying to add the platforms to the project, which is why I haven’t been able to post sooner. However, I also found solutions to them after some googling and trial and error.
Note: The errors are not due to Wappler, but rather to certain things not being done on my Mac computer (i.e. unable to create a directory or insufficient permissions on a directory)
I have been able to add Android, iOS, OS, Electron, Browser, and after I finish installing the almost 4 GB Visual Studio for Mac, I should be able to add the Windows platform.
@George, your tip above about actually reading the messages in terminal proved to be the guiding light in solving my issues !