[1.19.2] Server sometimes crashes when a player gets an advancement

[Eir-nya]

Description: I have D4F enabled in a server I run. Messaging and the chat relay all seem to work fine. When "announce_advancement" is set to true in the config, some advancements are successfully sent to the discord chat, but some aren't. I'm not currently sure of the distinction. When this happens, the server crashes with an error.

Error message:

[20:21:06] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.class_148: Ticking entity
	at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:879) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_3176.method_3813(class_3176.java:289) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:819) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:665) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.NullPointerException
	at java.util.Objects.requireNonNull(Objects.java:209) ~[?:?]
	at java.util.ImmutableCollections$MapN.containsKey(ImmutableCollections.java:1200) ~[?:?]
	at me.reimnop.d4f.utils.Utils.getPlaceholderHandler(Utils.java:89) ~[transformed-mod-d4f.i0:0/:?]
	at me.reimnop.d4f.listeners.MinecraftEventListeners.lambda$init$3(MinecraftEventListeners.java:88) ~[transformed-mod-d4f.i0:0/:?]
	at eu.pb4.placeholders.api.Placeholders$PlaceholderGetter.exists(Placeholders.java:207) ~[transformed-mod-placeholder-api.i0:0/:?]
	at eu.pb4.placeholders.impl.placeholder.NodePlaceholderParserImpl.recursivePlaceholderParsing(NodePlaceholderParserImpl.java:51) ~[transformed-mod-placeholder-api.i0:0/:?]
	at eu.pb4.placeholders.impl.placeholder.NodePlaceholderParserImpl.recursivePlaceholderParsing(NodePlaceholderParserImpl.java:72) ~[transformed-mod-placeholder-api.i0:0/:?]
	at eu.pb4.placeholders.impl.placeholder.NodePlaceholderParserImpl.recursivePlaceholderParsing(NodePlaceholderParserImpl.java:72) ~[transformed-mod-placeholder-api.i0:0/:?]
	at eu.pb4.placeholders.api.Placeholders.parseNodes(Placeholders.java:72) ~[transformed-mod-placeholder-api.i0:0/:?]
	at eu.pb4.placeholders.api.Placeholders.parseText(Placeholders.java:125) ~[transformed-mod-placeholder-api.i0:0/:?]
	at me.reimnop.d4f.listeners.MinecraftEventListeners.lambda$init$4(MinecraftEventListeners.java:84) ~[transformed-mod-d4f.i0:0/:?]
	at me.reimnop.d4f.events.PlayerAdvancementCallback.lambda$static$0(PlayerAdvancementCallback.java:11) ~[transformed-mod-d4f.i0:0/:?]
	at net.minecraft.class_2985.handler$ddg000$d4f$grantCriterion(class_2985.java:2524) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_2985.method_12878(class_2985.java:207) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_179$class_180.method_796(class_179.java:35) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_4558.method_22510(class_4558.java:74) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_2115.method_9097(class_2115.java:27) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_1309.method_5643(class_1309.java:1225) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_1665.method_7454(class_1665.java:373) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_1676.method_7488(class_1676.java:149) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_1665.method_5773(class_1665.java:226) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_1667.method_5773(class_1667.java:104) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_3218.method_18762(class_3218.java:712) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_1937.method_18472(class_1937.java:466) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_3218.method_31420(class_3218.java:371) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_5574.method_31791(class_5574.java:54) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.class_3218.method_18765(class_3218.java:339) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:875) ~[transformed-mod-minecraft-v1.19.2.jar:?]
	... 5 more

Minecraft version: 1.19.2

D4F version: 1.10.1-1.19.2

List of mods (server)