Solved How to send packet to player?

'While looking around on https://wiki.vg/Protocol I found ChangeGameStatePacket, which allows for changing the rain level. When set to high values it create cool effects like pitch black skies. I have been trying to make this packet for almost 3 hours now (including Bukkit API and ProtocolLib). But everything I tried always in some way ended up with this exact error:

Code:

java.lang.NullPointerException: Cannot read field "b" because "var0" is null

How can I send this packet? (I'm coding for 1.16.5)

I should say that I managed to fix it. If anyone cares here's the solution:

Code:

((CraftPlayer) player).getHandle().playerConnection.sendPacket(
new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.(INSERT LETER), 1f));

 

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