PaperUI not showing advanced channels

As the topic says, I just realised that PaperUI is not showing advanced channels anymore and there is no button “Show More”

I did a fresh install of Offline-Snapshot 271 - same result on different machines running Windows or Ubuntu (14.04 and 16.04)

Any hint how to solve this ?

Sounds to me like https://github.com/eclipse/smarthome/issues/1426.

Thanks @Kai, that indeed solved my problem.