LaTeX Error: Command \XeTeX already defined

Trying to run xetex on index.tex results in LaTeX Error: Command \XeTeX already defined. It seems to be caused by the bidi package and removing it seems to fix the issue without causing any other errors.

Specification

Operating System: Fedora 30
Texlive version: Tex Live 2018
XeTeX version: XeTeX 3.14159265-2.6-0.9999

Proposed Workaround

Removing or commenting out line 62 from index.tex