Entities hit by a projectile from a block will cause an error

[Nutty101]

reported by RavanelloMarrone on spigot.

Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_16_R3.projectiles.CraftBlockProjectileSource cannot be cast to org.bukkit.entity.Entity
at net.livecar.nuttyworks.npc_police.listeners.DamageListener.customEntityDamageByEntity(DamageListener.java:63) ~[?:?]
at net.livecar.nuttyworks.npc_police.listeners.DamageListener.onEntityDamageByEntity(DamageListener.java:37) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_261]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_261]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_261]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_261]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[spigot-1.16.4.jar:git-Spigot-37d799b-3eb7236]