Hang on, are you computing a cortical surface headmodel? (i.e. not an MRI volume?).
As I said in my first post, the error is only occurring for the "MRI volume" headmodel, not the default "cortical surface" headmodel.
Repeating your exact steps, I get the same original error if I compute a volume model, and no error if i compute the cortical surface model.
The link below contains the output in my command window from the commands you asked for:
https://pastebin.com/8bQWWsFV