NBT not working

[MCProHost]

Code:

 format gui slot 0 of player with skull with nbt "{SkullOwner:{Id:"51a4fbee-7979-4238-9639-afa845ae66a8",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNmFkY2Y5NjEwNjYxM2EzM2QzZDJhNDY0YWRiMWIxYTVjNWUwY2IxMWRjZTcyOTI2YjU5OTk0M2UzNjNkZiJ9fX0="}]}}}"

error:
[19:50:02 ERROR]: ':{Id:"51a4fbee-7979-4238-9639-afa845ae66a8",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNmFkY2Y5NjEwNjYxM2EzM2QzZDJhNDY0YWRiMWIxYTVjNWUwY2IxMWRjZTcyOTI2YjU5OTk0M2UzNjNkZiJ9fX0="}]}}}"' is not a valid item data (pickaxe levels.sk, line 7: format gui slot 0 of player with skull with nbt "{SkullOwner:{Id:"51a4fbee-7979-4238-9639-afa845ae66a8",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNmFkY2Y5NjEwNjYxM2EzM2QzZDJhNDY0YWRiMWIxYTVjNWUwY2IxMWRjZTcyOTI2YjU5OTk0M2UzNjNkZiJ9fX0="}]}}}"')

 

[Donut]

Escape the quotations

 

[MCProHost]

[21:51:32 ERROR]: ':{Id:""51a4fbee-7979-4238-9639-afa845ae66a8"",Properties:{textures:[{Value:""eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNmFkY2Y5NjEwNjYxM2EzM2QzZDJhNDY0YWRiMWIxYTVjNWUwY2IxMWRjZTcyOTI2YjU5OTk0M2UzNjNkZiJ9fX0=""}]}}}"' is not a valid item data (pickaxe levels.sk, line 8: format gui slot 0 of player with skull with nbt "{SkullOwner:{Id:""51a4fbee-7979-4238-9639-afa845ae66a8"",Properties:{textures:[{Value:""eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNmFkY2Y5NjEwNjYxM2EzM2QzZDJhNDY0YWRiMWIxYTVjNWUwY2IxMWRjZTcyOTI2YjU5OTk0M2UzNjNkZiJ9fX0=""}]}}}"')

Error after exscaping the quotations^^^^^^^^^^
Code:

    format gui slot 0 of player with skull with nbt "{SkullOwner:{Id:""51a4fbee-7979-4238-9639-afa845ae66a8"",Properties:{textures:[{Value:""eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNmFkY2Y5NjEwNjYxM2EzM2QzZDJhNDY0YWRiMWIxYTVjNWUwY2IxMWRjZTcyOTI2YjU5OTk0M2UzNjNkZiJ9fX0=""}]}}}"

 

[HackerOTVW]

Your server vesion ?
Try this:

make a gui slot 0 of player with player's skull with nbt "{display:{Name:""&2???""},SkullOwner:gameacid13}" to do nothing

 

[Donut]

I believe you can just do (“player name” parsed as player)’s skull

 

[MCProHost]

^ Yeah, but that would mean I have to look for players with each letter of the alphabet as their head... I need to use this custom head thing... Let me try hackers OTVW's idea and ill get back to you
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Tried his code, no errors but it didnt work...
I tried some other peoples code and its giving me the same error, I've never had this problem before.
I also have gotten this to work before (keep in mind the username means nothing because the nbt changes it.

give player skull of "MHF_Chest" parsed as offline player with nbt "{SkullOwner:{Id:f7d90747-ceb2-7e7c-7a25-bcb2e2165d5d,Properties:{textures:[{Value:eyJ0aW1lc3RhbXAiOjE0MzQ5NDk0MzgyMzQsInByb2ZpbGVJZCI6IjUwNzk4YjJhN2QxYjQxYTRiNmFlYzRiNWUwOWJjMTcxIiwicHJvZmlsZU5hbWUiOiJFbHN3ZXlyIiwidGV4dHVyZXMiOnsiU0tJTiI6eyJ1cmwiOiJodHRwOi8vdGV4dHVyZXMubWluZWNyYWZ0Lm5ldC90ZXh0dXJlLzgzNTFlNTA1OTg5ODM4ZTI3Mjg3ZTdhZmJjN2Y5N2U3OTZjYWI1ZjM1OThhNzYxNjBjMTMxYzk0MGQwYzUifX19 }]}}}" with name "&8Backpack:&7 (9 Slots)" with lore "||&8ID: &7%{curnum}%"