OTG Adapter - no power to NES mini?

[/classicNES]

Hi! I bought the following 3 port OTG adapter so I could extend the storage on my NES mini:
https://www.emax.co.nz/index.php?main_page=product_info&products_id=4295&gclid=Cj0KCQjwh8jrBRDQARIsAH7BsXftHbKDJHNx1AkaDrRYNevpB4mLEZUPOlFh8BOVrHU2pOrN-SM9yTAaAmNTEALw_wcB
Everything connects fine, but the NES mini does not power on when it is used. Is there something I'm missing?

submitted by /u/hamontoast
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