Please see the v1.4.0 Release Notes before installing this update.
This release brings with it support for UniFi Controller versions 5.11.x. This controller version is still in beta, and changed some data formats. Those formats have been accounted for in the unifi library and now here.
Additionally, this release should build multi-architecture Docker images. Docker Images can now be used on processors from the following families: arm, arm64, amd64 (64-bit x86), and i386 (32-bit x86).