Ben 10 DLC listed as incompatible on latest Fire 7

I have purchased Ben 10 DLC via the marketplace and am wishing to access across devices.

Expected

When accessing my worlds on a separate Amazon Fire 7 device, I can install Ben 10 DLC

Actual

Under my worlds, Ben 10 DLC is listed as incompatible

System

Amazon fire 7, 9th gen, 1gb ram