Hello, I had the same problem with Scribus 1.5.5 (64-bit on macOS), specifically with the Google version of this font. I went back and found the individual files that I'd previously downloaded, between Octavio Pardo's Github repo and the original repo (I only downloaded fonts that Octavio hadn't worked on). The problem seems to be with the variable font file available from Google, ostensibly for reasons of size and organization.