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

It was a few extensions for me. Disabling and then re-enabling fixed the problem though. Grammarly was one of them. Hope the errors don't return.