Resolved -
We suspected the issue to be on Square's end, so we notified their team and they've identified the issue. It is resolved in version 7.23 of the Square POS Android app. Please ensure you update to this version.
Sep 2, 19:51 EDT
Investigating -
Users are experiencing errors when trying to process Square Reader payments using Chrome version 152 on Android.
Aug 31, 15:57 EDT