Addon fails to install on CCU3

[winnieXY]

Hey,
I've downloaded the latest release of the addon (1.5.8+2) and tried to install it via the webui of the CCU3 (Settings -> Systemsettings --> Additional Software) (roughly translated from german to english). After uploading the tar.gz and clicking on "install" the CCU3, disconnects the ssh connection in the background (so I assume it reboots), however the boot fails. The ccu3 has afterwards a red permanent red light. Connections via ssh or web are not possible. Only way to fix this is to cut of the power and reboot the CCU3 again.
After this the CCU3 boots fine, however the plugin is not installed.

[deg0nz]

I thought so too, but it turns out that my ccu needed a loooooong time to boot. After some patience, the webUI was available again and the plugin was installed