Sell hassle free with pistonheads auction HELP

[nutsyH]

Canyone please advise me on how to stop this pop up appearing incessantly on this forum ? Every time I click on a new subject, or new post inthe same subject, the thing slides in from the left offerin a free valuation. I'm not even selling a car.
Thanks in advance

[Drogo]

An add blocker, I don't see them.
I use Safari and Adguard.

[Matt Dell]

Do you have anything preventing cookies from being set? Any third party extensions or Brave / DuckDuckGo browsers?

It's set to show only once, but it needs to be able to set a cookie for that to happen.

[nutsyH]

Matt, yes I have Norton anti tracker running. What do
I need to do to exclude this cookie from.the anti tracker. I am not an IT person, just a petrolhead

Paul