Hi @Habit367
We are trying to fix this but are reliant on the sim engine engineers from Asobo to help diagnose it. As this could take a while we suggest Xbox’ers request a refund. When fixed it will be available for purchase again.
You can do so via the details in the above link also copied here for reference:
[UPDATE v 1.4.0] Vessels: Enhanced AI | Seafront Simulations
Please make sure you message the mods as described in the post too.