I checked on this with the relevant team and would request you to kindly file a ticket with the client care team as this issue would need some more research. Please refer to this doc for more details on how a supported user can log a ticket.
Thank you for reply. I'm already followed steps from doc to integrate Adobe Target, but the problem is not gone.
If I replace file /etc/clientlibs/foundation/testandtarget/util/source/init.js from CQ5.6 the problem will be gone but in AEM 6 it is still appears.
Fo my vision there is a lack of mboxOfferDefault.prototype.hide() function in init.js as there is a call to it (316 line of code in /etc/clientlibs/foundation/testandtarget/util/source/init.js inAEM 6).