Seeking Assistance: Resolving Expressions Error in AE Project from Envato Elements

Hello, could someone assist me in resolving an expressions error in the AE project I obtained from Envato Elements? I am seeking guidance to find a solution.

Expression disabled. Error at line 1 in property 'Map White to' of layer 5 ('Leak') in composition 'Final Comp'. Error: effect named 'Leak Color' is missing or does not exist. It may have been renamed, moved, deleted, or mistyped.

Link to the project: Help to Children Slideshow, Video Templates - Envato Elements