Hi itch-Team,
i looked into the currently famous Cloudflare-Captcha problem (see forum) as i also was getting extremely annoyed by it and likely found an easy fix.
You just have to add the following line in the main.ts after onReady to override the UA:
let onReady = () => {
app.userAgentFallback = userAgent();
At least this works for me locally in dev mode. I guess that sometimes there is no custom UA set and instead the default of Electron is sent which confuses Cloudflare.