[MC-68233] The Skin does not show up on the player, instead shows the "Invalid Texture"

Quick workaround

This issue has to do with skinservers now looking at <UUID>.png instead of <username>.png.

If this annoys you, you can reupload your skin on minecraft.net which will fix this for you.
This may not work 100% of the time.

[19:09:43] [Client thread/WARN]: Failed to load texture: minecraft:skins/7cfb302d6cbe52a962011699b9d650969653c6a87d4b8e27cde19251ed9d89
java.io.FileNotFoundException: minecraft:skins/7cfb302d6cbe52a962011699b9d650969653c6a87d4b8e27cde19251ed9d89
at cuv.a(SourceFile:52) ~[14w34c.jar:?]
at cvm.a(SourceFile:55) ~[14w34c.jar:?]
at ctp.a(SourceFile:28) ~[14w34c.jar:?]
at cua.a(SourceFile:56) [14w34c.jar:?]
at cua.a(SourceFile:38) [14w34c.jar:?]
at cpp.a(SourceFile:70) [14w34c.jar:?]
at cpp.c(SourceFile:65) [14w34c.jar:?]
at cqr.a(SourceFile:228) [14w34c.jar:?]
at cqr.a(SourceFile:162) [14w34c.jar:?]
at csw.a(SourceFile:58) [14w34c.jar:?]
at csw.a(SourceFile:19) [14w34c.jar:?]
at cpo.a(SourceFile:293) [14w34c.jar:?]
at cpo.a(SourceFile:258) [14w34c.jar:?]
at cpo.a(SourceFile:225) [14w34c.jar:?]
at cki.a(SourceFile:586) [14w34c.jar:?]
at cjd.a(SourceFile:1218) [14w34c.jar:?]
at cjd.a(SourceFile:1123) [14w34c.jar:?]
at cjd.b(SourceFile:976) [14w34c.jar:?]
at bsr.as(SourceFile:902) [14w34c.jar:?]
at bsr.a(SourceFile:313) [14w34c.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:120) [14w34c.jar:?]

After re-uploading skin:

Exception in thread "Texture Downloader #1" java.lang.NoSuchMethodError: com.mojang.authlib.minecraft.MinecraftProfileTexture.getMetadata(Ljava/lang/String;)Ljava/lang/String;
	at ceo.a(SourceFile:111)
	at cvr.a(SourceFile:84)
	at ctk.a(SourceFile:66)
	at ctl.run(SourceFile:125)