Unfortunately I can't install Vuforia Chalk anyway...
The error message is: "your device is not compatible with this version"
What can I do?
We require at least Android 7 and a 64-bit OS to download Chalk on Android. Outside of that, some unsupported devices are blocked from allowing a Chalk download. If your phone meets the above requirements, Chalk is unfortunately unavailable for use on your device at this time.
At this time, your device is not supported and unfortunately is not currently available for use with Chalk. Expanding our Android supported device list is high on our priority list and we are actively working on this.