Easycart does not work on Chrome or Microsoft Edge

[maaatt]

Edit: Things seem t work when I am logged in. But not as a visitor.

[maaatt]

It appears easy card has stopped working on the Chrome and Microsoft Edge. Whatever you do new products not appear in the catalogue but when you do get them to appear they do not get added to cart as no product can be found. This works with adjusted products and newly added products. Does anyone have any ideas

I have green ticks on all of the diagnostics and the plugin has been installed for several years