Trying to broadcast the event "minecraft:spawn_particle_attached_entity" from the server does nothing and produces zero errors. Trying to broadcast the event "minecraft:spawn_particle_attached_entity" from the client does nothing and produces the error "[Scripting][error]-Script Error: Something went wrong..." in chat.
Whoops I didn't see https://bugs.mojang.com/browse/MCPE-40079 when I searched for it. Although I was never able to get it to work on the client in the latest beta as described in that card. Can be marked as duplicate