[19:20:59 WARN]: Couldn't look up profile properties for com.mojang.authlib.GameProfile@f02120a[id=90c0c1fe-a180-3a77-9073-3c6b21f0ccfb,name=null,properties={},legacy=false]
java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:34) ~[authlib-4.0.43.jar:?]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:181) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillGameProfile(PaperMinecraftSessionService.java:38) ~[paper-1.20.1.jar:git-Paper-43]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:152) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillProfileProperties(PaperMinecraftSessionService.java:31) ~[paper-1.20.1.jar:git-Paper-43]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$2(SkullBlockEntity.java:149) ~[?:?]
at net.minecraft.Util.ifElse(Util.java:450) ~[?:?]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$5(SkullBlockEntity.java:141) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
[19:21:00 WARN]: Couldn't look up profile properties for com.mojang.authlib.GameProfile@f02120a[id=90c0c1fe-a180-3a77-9073-3c6b21f0ccfb,name=null,properties={},legacy=false]
java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:34) ~[authlib-4.0.43.jar:?]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:181) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillGameProfile(PaperMinecraftSessionService.java:38) ~[paper-1.20.1.jar:git-Paper-43]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:152) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillProfileProperties(PaperMinecraftSessionService.java:31) ~[paper-1.20.1.jar:git-Paper-43]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$2(SkullBlockEntity.java:149) ~[?:?]
at net.minecraft.Util.ifElse(Util.java:450) ~[?:?]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$5(SkullBlockEntity.java:141) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:34) ~[authlib-4.0.43.jar:?]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:181) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillGameProfile(PaperMinecraftSessionService.java:38) ~[paper-1.20.1.jar:git-Paper-43]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:152) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillProfileProperties(PaperMinecraftSessionService.java:31) ~[paper-1.20.1.jar:git-Paper-43]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$2(SkullBlockEntity.java:149) ~[?:?]
at net.minecraft.Util.ifElse(Util.java:450) ~[?:?]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$5(SkullBlockEntity.java:141) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
[19:21:00 WARN]: Couldn't look up profile properties for com.mojang.authlib.GameProfile@f02120a[id=90c0c1fe-a180-3a77-9073-3c6b21f0ccfb,name=null,properties={},legacy=false]
java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:34) ~[authlib-4.0.43.jar:?]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:181) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillGameProfile(PaperMinecraftSessionService.java:38) ~[paper-1.20.1.jar:git-Paper-43]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:152) ~[authlib-4.0.43.jar:?]
at com.destroystokyo.paper.profile.PaperMinecraftSessionService.fillProfileProperties(PaperMinecraftSessionService.java:31) ~[paper-1.20.1.jar:git-Paper-43]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$2(SkullBlockEntity.java:149) ~[?:?]
at net.minecraft.Util.ifElse(Util.java:450) ~[?:?]
at net.minecraft.world.level.block.entity.SkullBlockEntity.lambda$updateGameprofile$5(SkullBlockEntity.java:141) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
- Couldn't look up profile properties for com.mojang.authlib.GameProfile@f02120a[id=90c0c1fe-a180-3a77-9073-3c6b21f0ccfb,name=null,properties={},legacy=false]
- java.lang.IllegalArgumentException: Name and ID cannot both be blank
意思是：无法查找的配置文件属性，名称和ID不能都为空
你应该检查配置文件，如果你不知道怎么做，请发送服务器各项信息以便帮助你
我指的是核心类型，插件或MOD，以及版本
事实上是不推荐将报错隐藏，屏蔽的
如果你实在觉得报错在控制台里不顺眼，可以试试console spam fix
https://www.spigotmc.org/resources/console-spam-fix.18410/
如果你实在觉得报错在控制台里不顺眼，可以试试console spam fix
https://www.spigotmc.org/resources/console-spam-fix.18410/