How to fix 'Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.'

Question

I have the following error in the Chrome Dev Tools console on every page-load of my Node/Express/React application:

Unchecked runtime.lastError: Could not es

Answer 1

Solution

For Chrome:

1. You have the window open with the console error, open up a second new window.

2. In the second window, go to: chrome://extensions

3. Disable each extension by toggling (the blue slider on the bottom right of each card), and refresh the window with the console after toggling each extension.

4. Once you don't have the error, remove the extension.