inject.preload.js failing to load a file in chrome from my dev environment

Looks like it is officially broken. The issue is ticketed at https://issues.adblockplus.org/ticket/6744

I tried to debug and find the exact cause, but the issue seems to be elsewhere. The JS code debugged (inject.preload.js at line 373)

document.documentElement.appendChild(script); // here, script.src is indeed a valid script
document.documentElement.removeChild(script);
URL.revokeObjectURL(url);

The script's src attribute targets a valid blob JS which is alive when this line is called!

the ticket is on review and they working on it. Now you can add the entire test site to your trusted sites

I installed an older version of Chrome and I solved the problem. https://www.slimjet.com/chrome/google-chrome-old-version.php

If you have any adBlocker then remove or pause for that specific page adBlocker, it worked for me i had the same issue with JavaScript Application when fetching data from Firestore.