Install Wanam Xposed on Rom Custom 5.0

Hi
I have install this Rom Custom Deoxed 5.0 here : http://forum.xda-developers.com/gala...-duos-t3195300

And i tried to install Wanam Xposed, but it doesn't work.
I install the version "XposedInstaller_3.0_alpha4.apk" and i flash the sdk21 here : http://forum.xda-developers.com/xpos...lipop-t3113463 ( i tried all version).
I have the same error : xposed framework v3.0 alpha 4 is installed but not active, please check the logs for détail

I have a G900FD.

Thanks for help.