Galaxy S6 (Android 7.0): Works fine.
Xiaomi Mi A3 Android 11 loaded everything correctly.
I tried 7 extensions at once in one application.
Maybe App Inventor should consider making Companion available only from Android 6 onwards. Who tests on devices with API < 23 these days?
We'll be dropping support for SDKs lower than 14 next summer with the annual Google Play SDK compliance update.
(added to FAQ)
So based on the logs it looks like it's failing to create a specific directory on that device. It's odd that it's trying to do it on the external SD card directory. Do these devices have physical SD card slots?
Yes, the Galaxy Note3 has a removable SDcard slot, but there is no SDcard and the Galaxy Alpha doesn't have a SDcard slot.
Btw, the Galaxy Note8 (Android 9) also has a removable SDcard slot (and in my case there is a removable SDcard) and it works fine.
Extensions work on Chromebook companion- build name: dedede android version: 13 security update: November 5
Motorola Moto G (Android 5.1):
It only works with one extension, but fails with two or more.