This is a common error. The apps that you want to install are compiled only for arm architecture, which is found on many mobile devices. At this time, Anbox is only supporting the architecture of your computer, which is evidently not an arm device.
The options we face are:
- Development needed to support translation of the arm <-> x86 libs
- Development of apps for non-arm architecture
You will find that some apps are actually built independently of architecture and will install in Anbox.