Web proxies - fuzzing with Burp Suite. Banging my had against a wall

I finally gave up on using Burp because it took forever and used Zap to fuzz for .html files in the admin directory. Found one - index.html - which is a blank page. I checked the response headers and the source code for the page, and there is no source code. It’s all just a big blank.

Zap is still running (scanned over 33,000 names so far) but the only one that wasn’t a 404 Not Found was index.html, which is a bust.

Is this my error, or has something gone wrong here?

Nope, never mind. Just found the flag using Zap at the 40,000th item. Burp never picked it up, which is weird…

Thanks