One or more blueprints has an unresolved compiler error, are you sure you want to Play in Editor?

as of very recently everythime i try to play in the dev kit it shows this message
One or more blueprints has an unresolved compiler error, are you sure you want to Play in Editor?
EndBoss_ProjEnergyBeam_PreFire
if i press yes my dev kit crashes
i am not sure how to fix this could anyone help ?

search in there for EndBoss_ProjEnergyBeam_PreFire . Then, compile that file, you may have to refresh the nodes too, don’t remember.
for anyone that has the same issue that is the fix