NotFoundError:Failed to exectue "removeChild" on Node

Describe the problem.
I am trying to scrape my employers website for inventory listing on my own site. I can get the scraper to go through the drop down menu and into new vehicles. But when I attempt to set selectors on the next page I get an error message," NotFoundError: Failed to execute 'removeChild' on 'Node'. The node to be removed is not a child of this node.

I get the same result when I try to scrape preowned vehicles. I've watched tutorials, and tried several different selectors. I'm new to all this and getting frustrated.

Any help will be greatly appreciated.

Url: http://https://www.riversidechryslerjeepdodge.net/

Sitemap: NONE - Frustration has me starting over
{id:"sitemap code"}

EDIT: If I go to another open tab the error message doesn't appear when I click back.

@matternmatt Hi. What are the data points(f.e - title, price and etc.) you are looking to extract?

I need to extract image, title, price, mileage. Vin, stock#, and description.
If you go to the site and then New Vehicles you will get a list of "cards" each is a link to more info. I would love to have the key features on that page. And multiple pictures as well.

Thankyou