Malfunction in AEM Integration

Hello,

at my workplace we are finalizing the integration between Target and AEM (using Adobe IO).
The configurations seem to have gone well, but when I try to export the Experience Fragments to Target, what is received is not a Experience Fragment on AEM, but quite literally the HTML (and on Target, they tell me, they see that the source is Adobe Target Classic).

After searching for a while, I think we are encountering the issue described here (https://docs.adobe.com/content/help/en/experience-manager-65/release-notes/service-pack/sp-release-notes.html) :

In the Known Issue section. We are currently on AEM 6.5.4.0. I'd say the rest of the configurations (considering that the Fragments have been exported) should be correct. In the Target configuration we specified at.js as a library.
I was wondering, has anybody found a solution to this problem? How can we proceed to have our AEM Experience Fragments properly imported in the offers of Target?

Any help, update or information that I might have missed is very much appreciated.

Thank you,

Parag Dalal.