Option minionint broken, integrals render as щ

[NanoExplorer]

I just installed this package and everything seems to work ok except for the integrals when using the minionint option. When that option is selected, integrals appear as the character "italic щ" instead. Here's an example from my random math mode test.

I wanted to see if this would happen if I compiled the documentation document as well, but it refused to compile saying command \code already defined or name \end... illegal. Should I open a separate issue for that?