need help, how to add html id or class container

Hello, i need your help regarding on this plugin. When I enable the ajax is not working and it has an error.

It appears that this page does not contain a container with the specified «HTML id or class of the Posts Container». Try to specify the correct one in the Filter Set settings or the common plugin Settings.

Please help how can I find the html id or post container whatever.. i have to activate this asap. please.

Please see my website link – where still in maintenance mode and please look on the PRODUCTS – MENU HEADER.

thank you!

The page I need help with: [log in to see the link]

 

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