Actor Property (Entity Property) is a very powerful feature introduced in v1.16.230.52 to store data on entities efficiently. But there is an issue where Actor Property does not apply to player entities, and returns an unexpected error.

Steps To Reproduce:

1. Turn on 'Content Log' toggles in "Settings > Creator" ("Settings > Profile" if it was on an older version)
2. Create a new world with enabling the Experiments toggle.
3. Apply the behaviour pack following in your world: actor_property_on_player_entity_behaviour_pack.mcpack
4. Open the world and the property "property:counter", and "property:maximum_counter" should have applied to the player entity, but it displays an error on the Content Log UI instead of updating the Actor Property:

I do hope this issue would be fixed, since the Actor Property should be applied to any entities, including the custom ones, amd thank you.