Getting Unchecked runtime.lastError on chrome whenever moving the mouse

I believe the problem is with an installed extension not correctly interfacing with the JavaScript part of the displayed page.

A similar problem is well documented (although for Firefox), where it is explained with an example.

Try to use Chrome in Incognito mode, where extensions are disabled, to see if that's indeed the problem, and in that case disable extensions in normal mode via chrome://extensions/ until you find the one causing the problem.