Script errors are typically caused by something within Internet Explorer or Microsoft Edge. If you are using another browser as your default then you can get rid of the script errors by simply making IE or ME the default browser instead.
To do so, go to the Control Panel and click on Default Programs. Click Microsoft Internet Explorer, or Microsoft Edge, and click the blue link at the bottom of the window to make it the default program. Open QuickBooks again and see if the errors go away.