I finished to build my reactor and wanted to check the interface and this code just pop in the chat "An unknown multiblock error has orccurred, report to mod author" so i do what the game told me :) here a screenshots

Update: The reactor still take item inputs. I thinks it's just interface that is bugged.

The reactor as 2 port one controller and one power tap

Well now it works just fine !? i did use a redstone tap to boot it and still not work until i just move around for half a minute