Also remember, by fixing that deficiency, you’re making yourself a better and more competitive applicant over the classmates at your school who haven’t taken it! There’s no reason not to find a way to take that course! It will only be a win for you, and you’ll learn the stuff, which is always good regardless of where you end up.
I’m an URM too. There aren’t many of us living in the Ivory Tower, so it’s important for us to be at these places to stand our ground and give other perspectives. If you aren’t accepted by your classmates and/or faculty, that’s their problem and not yours. Especially in the climate today, we need to be heard. It’s time for some stuff to change. Get it, girl!