I don’t see any uses of MathJax in that app. Can you point me to where you have the MathJax import?
Assuming that you have that import somewhere, it would be failing because you don’t have anything in your Native Libraries section to import MathJax. According to the MathJax documentation, you’d need this in your Native Libraries section:
<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>