Alien failing to convert .rpm to .deb (18.04)

I’ve used this command before and it’s worked fine so this may have to do with the file I’m trying to convert but when I run alien on this .rpm I get this error:

mkdir -/debian failed: No such file or directory at /usr/share/perl5/Alien/Package/ line 373. 

No .deb is created but some folders with names like opt/ and etc/ are created in the same directory as the .rpm, I tried just copying their contents to the respective system folders but that didn’t work, guess its not that easy.

This is what I’m trying to install:

And the files themselves: