AEM| Target Integration| Not able to see experiences changed as per audience

Hi Team,

We have done integration with AEM and Adobe Target (dtm with at.js) on local server. Required cloud configurations are set up on Page properties for DTM and Adobe Target.

We could see that experiences are coming in the response of mboxes. But those mbox responses are not being rendered for some reason in preview mode or with ?wcmmode=disabled.

Also getting below warning in console log -

AT: [applyOffer()] mbox option is required

Not sure what I need to do to enable that rendering of responses. Any help is highly appreciated.