Playback of encrypted channels fails in kodi: “demux read nothing”

I am using TVH 4.0.9 on an Ubuntu 16.04 machine using a TBS 6928SE PCI DVB-S Card with a CI Slot. Watching encrypted channels through the TVH Web-Interface works just fine, on Kodi however I get the error message “demux reads nothing” and playback never starts. pvr.hts is 3.4.12 and Kodi is v17 beta 6. Playback of unencrypted channels works fine, both SD and HD.

Debug Log