Definitely something going on that doesn't make sense here - input impedance of the mic input for that amp appears to be 1k, with the mic at 300ohm. Yes it's mismatched, but not enough to cause zero signal.
I'm guessing cable - can you borrow a standard xlr and try an adaptor, or get another xlrl to 1/4”?
Pretty sure they're asking for software FOR Windows, rather than Windows itself.