Which version of the app do you use?
Mine is running on 4.5.2 and just working fine.
It can also be, that the app didn't requested root permissions.
Else try to uninstall the "Riru Core" & the "EdXposed" module from magisk.
Reiinstall "Riru Core" and try the other version of EdXposed from the EdXposed Manager (If it has stopped crashing) (If u installed Sandhook, try YAHFA).
Yeah, i removed everything EdXposed related then reinstalled them. But instead of Sandhook i tried Yahfa and so far it seems to work (can't get lucky patcher to work though but that's another story for another day....)
Anyway thank you man.