Could you please try out the following?
a) Please check if mbox.js is present in the website. If present, make sure "includeExperienceManagerPlugin" is set to true. If false, target libraries will not load in VEC.
b) Check for target libraries while opening the website in the VEC. Go to the browser network window and check for the presence of target.js.
If it continues to fail, please also share the site URL.
Any special reason of configuring Target through DTM?
I deployed Target with DTM to the visual editor composer. The Target/AEM integration requires the Target stakeholder to also know how to use AEM.
Are you still facing the issue ?. If yes, Please do let us know so that we can further help you with same.
Thanks & Regards
It's been fixed. Thanks!