Y'know what, pressing F12 or the Developer Tools doesn't even produce anything. That same error I posted above still come out.
The file (that says 'unhandled' in error pic above) is actually inside EO's CefEOBrowser, so I'm convinced the problem is in my PC.
I guess I should update some...but this is Windows 10 and I don't really want to move to further Win10 build.
I just realised this effin Win10 already installed something related to Windows Update that should not be there.....