Error in content-all-sites.js file on all sites when I press f12 in Chrome. What is the problem?

Question

JavaScript

On all sites (both mine and not mine), when I enter developer mode, an error appears:
"Uncaught TypeError: Cannot read property 'children' of null
at content-all-sites.js:12
at content-all-sites. js:12"
What's the problem?

Answer 1

It's from your extension.