Missing LaTeX style file

[herronjo]

Attempting to view the example provided in README.md (https://ximera.cloud/mooculus/calculus/derivativesOfInverseFunctions/digInDerivativesOfInverseTrigonometricFunctions) or any other Mooculus file (as far as I've tested) returns the following error:

This is e-TeX, Version 3.14159265-2.6 (preloaded format=latex 2020.1.12)
**entering extended mode
LaTeX2e <2019-10-01> patch level 1

*("digInDerivativesOfInverseTrigonometricFunctions.tex" ("ximera.cls"
Document Class: ximera 2020/01/15 v2.00 Simultaneously write print and online i
nteractive materials

'::.   .::' ::  :::::     :::::  .:::::::::::::::::::.    ::: 
  '::.::'   :: ::: :::   ::: ::: ::                :::   ::':: 
    :::     :: :::  ::: :::  :::  ::::::::: .::::::::'  ::' ':: 
  .::'::.   :: :::  ::: :::  ::: ::         ::  '::.   ::'   ':: 
.::'   '::. :: :::   ':::'   ::: '::::::::: ::    '::.::'     ':: 

("article.cls"
Document Class: article 2020/04/10 v1.4m Standard LaTeX document class
("size10.clo")) ("everyhook.sty" ("svn-prov.sty") ("etoolbox.sty"))
("enumitem.sty") ("titlesec.sty") ("titletoc.sty") ("titling.sty") ("ifpdf.sty"
) ("environ.sty" ("trimspaces.sty")) ("listings.sty" ("lstmisc.sty"

***
*** This file requires `listings.sty' version 1.8c.
*** You have a serious problem, so I'm exiting ...
***