I didnt see it in any of the past few years mailing list so I thought I would just share.
I had a problem where my system didnt have the software needed to make/install the
mediawiki texvc/ math renderer. Then after installing all the correct dependencies, I was
getting this error: MATH -> Failed to parse (PNG conversion failed)
After an hour+ of trying a lot of stuff, I stumbled across this: fmtutil-sys --all
Just running this command fixed the issue for me.