can't install the hbbtv-webkit plugin on Zgemma h9 combo and OpenBH 5.1.011

Dear friends, I have installed OpenBH 5.1.011 firmware on my Zgemma h9 combo receiver downloaded here from the site. But I can't install the hbbtv-webkit plugin. Does anyone know where the problem is? Thanks for the advice.

Attached file - nothing at all.

The original plugin says when installing:

Console

*calculate_dependencies_for: Cannot satisfy the following dependencies for enigma2-plugin-extensions - hbbtv-webkit:

*directfb(>=1.7.7)* webkit-classic* webkit-classic-browser*

*opkg_solver_Instal:Cannot install package enigma2-plugin-extensions-hbbtv-webkit.

Finish!