Read.Cash formatting unusable

I'm new to read.cash and trying to post my first article, however, I continually get an error message when saving my drafts saying that "Sorry, your account is not allowed to post links". The problem is, that it considers any kind of formatting to be a link!!! That is, I can't even use the H1, H2 headers, else I cannot save my draft. This seems pretty limiting. I haven't yet tried embedding images. Is there a way around this? Seems like a bug to me. (And yes, I tried multiple browsers before I wrote this).