Help With "missing depencients"

Can anyone help me
i need help because i can't make procedures

"missing depencients" is showing

in 'when entity walks on block'
this is procedure:
 

If:

OR

       OR get item from armor slot 3 of 'event target entiy'     get item from armor slot 1 of 'event target entiy'

       OR get item from armor slot 2 of 'event target entiy'     get item from armor slot 0 of 'event target entiy'

do Add Potion effect 1 30 type: regeneration

else Add potion effect 1 10 type: poison