Couldn't place player in world/Invalid player data

[configari]

[17:29:52] [Server thread/ERROR]: Couldn't place player in world
java.lang.NullPointerException: Cannot invoke "net.minecraft.class_3222.method_5667()" because "$$0" is null
	at knot/net.minecraft.class_2703$class_2705.<init>(class_2703.java:162) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_2703.<init>(class_2703.java:40) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1297.disguiselib$sendProfileUpdates(class_1297.java:7491) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1297.setGameProfile(class_1297.java:7439) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1297.handler$bbe001$disguiselib$fromTag(class_1297.java:7614) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1297.method_5651(class_1297.java:2183) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_29.method_55788(class_29.java:87) ~[server-intermediary.jar:?]
	at java.base/java.util.Optional.map(Unknown Source) ~[?:?]
	at knot/net.minecraft.class_29.method_55789(class_29.java:84) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_3324.method_14600(class_3324.java:330) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_3324.method_14570(class_3324.java:158) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_8610.mixinextras$bridge$method_14570$38(class_8610.java) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_8610.wrapOperation$dci000$polymer-networking$polymerNet$prePlayHandshakeHackfest(class_8610.java:1038) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_8610.method_52408(class_8610.java:152) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_8736.method_53043(class_8736.java:22) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_8736.method_65081(class_8736.java:8) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_2600.method_11072(class_2600.java:27) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_3738.run(class_3738.java:18) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1255.method_18859(class_1255.java:164) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_4093.method_18859(class_4093.java:23) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_24306(MinecraftServer.java:889) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_18859(MinecraftServer.java:180) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1255.method_16075(class_1255.java:138) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_20415(MinecraftServer.java:871) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_16075(MinecraftServer.java:865) ~[server-intermediary.jar:?]
	at knot/net.minecraft.class_1255.method_5383(class_1255.java:123) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_16208(MinecraftServer.java:833) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:719) ~[server-intermediary.jar:?]
	at knot/net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:292) ~[server-intermediary.jar:?]
	at java.base/java.lang.Thread.run(Unknown Source) [?:?]

Compiled the source on my own and tried disguising and clearing the disguise, it told me an error in chat and now when I try to rejoin this happens.