Incompatible with TexLive 2020

[ohebbi]

Problem
Is not compatible with 2020 versions of downloaded packages from either MacTex or MikTex (both tried and tested on Mac OS X Catalina 10.15.7). In particular, uiofysmaster struggles with the package iftex since its if/else/fi definitions have changed over the years.

Solution for me
Rolled back to 2016 TexLive package, which is compatible with this document class.