I im from germany, (sorry for my bad english)
i have the same problem.
today i get my complete new tablet (Android).
i want to use it as a POS System.
first app i install was Shopify
second app i install was shopify pos.
i cant login!
i tried everything like u guys.
refresh passwort, delete apps…
i dont work!
on my iphone and laptop it work!
PLEASE SHOPIFY FIX THIS PROBLEM!