Twitch player shows "Failed to load module" and core-error overlay when script is enabled
Author: RouatbiHCreated Dec 31, 2025Updated Jan 5, 2026
Description
When this script is enabled, Twitch shows a “failed to load module” error and displays a div with the class core-error over the video player.
Important:
The video stream itself does play, but the core-error overlay covers the player area and blocks all mouse interaction (clicking, controls, etc.).
Disabling the script removes the overlay and restores normal interaction.
Expected behavior
- Video player loads normally
- No
core-erroroverlay - Player controls remain clickable
Actual behavior
- Video stream plays successfully
- Twitch displays a “failed to load module” error
- A
div.core-erroroverlay appears on top of the player - Player area becomes non-interactive (cannot click controls)
Screenshot
The video is playing, but a core-error overlay blocks interaction with the player.
Steps to reproduce
- Open twitch.tv
- Enable this script
- Open any live stream
- Video plays, but a
core-erroroverlay appears and blocks interaction
Environment
- Browser: Firefox v146.0.1
- OS: Windows 11
- Script manager: uBlock Origin 1.68.0
- Script : video-swap-new-ublock-origin.js and vaft-ublock-origin.js
Source: pixeltris/TwitchAdSolutions