Bug report: v10 not working in Firefox

I've just installed v10.0.0 from v9.55.0. I completely deleted the old installation directory, recreated it, cloned from github, changed ownership to www-data, and ran the install and build commands. I can load CyberChef v10 in Chrome just fine, but Firefox provides the following error details:

TypeError: document.querySelector(...) is null
Filename: https://cyberchef.78z.us/assets/main.js
Line: 2
Column: 5241977
Error: TypeError: document.querySelector(...) is null
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0
CyberChef version: 10.0.0