Offline player uuid not working

[ReportCards]

When I attempt to get the players uuid to set there skull on a block as there skull it doesn't work

Spoiler: Code

command /donate <offline player> <text>:
    permission: donate.use
    trigger:
        if arg-2 parsed as text is "500c":
            broadcast "&c[&4DONATION&c]&e Everyone please congratulate %arg-1% on getting &c500 Coins"
            set {recent.3buyer} to "%{recent.2buyer}%"
            set {recent.3item} to "&6%{recent.2item}%"
            set {recent.3buyeruuid} to "%{recent.2buyeruuid}%"
            set {recent.2buyer} to "%{recent.1buyer}%"
            set {recent.2item} to "&6%{recent.1item}%"
            set {recent.2buyeruuid} to "%{recent.1buyeruuid}%"
            set {recent.1buyer} to "%arg-1%"
            set {recent.1item} to "&c500 Coins"
            set {recent.1buyeruuid} to "%arg-1's uuid%"
            make console execute command "/updatesigns"
        if arg-2 parsed as text is "1000c":
            broadcast "&c[&4DONATION&c]&e Everyone please congratulate %arg-1% on getting &c1000 Coins"
            set {recent.3buyer} to "%{recent.2buyer}%"
            set {recent.3item} to "&6%{recent.2item}%"
            set {recent.3buyeruuid} to "%{recent.2buyeruuid}%"
            set {recent.2buyer} to "%{recent.1buyer}%"
            set {recent.2item} to "&6%{recent.1item}%"
            set {recent.2buyeruuid} to "%{recent.1buyeruuid}%"
            set {recent.1buyer} to "%arg-1%"
            set {recent.1item} to "&c1000 Coins"
            set {recent.1buyeruuid} to uuid of arg-1 parsed as offline player
            make console execute command "/updatesigns"
command /updatesigns:
    permission: signs.update
    trigger:
        send "&cUpdating signs..."
        make console execute "/blockdata 491 51 497 {Text2:""{\""text\"":\""&6%{recent.1buyer}%\"",\""color\"":\""gold\""}"",Text3:""{\""text\"":\""%{recent.1item}%\"",\""color\"":\""yellow\"",\""bold\"":true}""}"
        make console execute "/blockdata 493 51 497 {Text2:""{\""text\"":\""&6%{recent.2buyer}%\"",\""color\"":\""gold\""}"",Text3:""{\""text\"":\""%{recent.2item}%\"",\""color\"":\""yellow\"",\""bold\"":true}""}"
        make console execute "/blockdata 495 51 497 {Text2:""{\""text\"":\""&6%{recent.3buyer}%\"",\""color\"":\""gold\""}"",Text3:""{\""text\"":\""%{recent.3item}%\"",\""color\"":\""yellow\"",\""bold\"":true}""}"
        make console execute command "/blockdata 491 52 496 {Owner:{Id:""%{recent.1buyeruuid}%"",Name:""%{recent.1buyer}%"",}}"
        make console execute command "/blockdata 493 52 496 {Owner:{Id:""%{recent.2buyeruuid}%"",Name:""%{recent.2buyer}%"",}}"
        make console execute command "/blockdata 495 52 496 {Owner:{Id:""%{recent.3buyeruuid}%"",Name:""%{recent.3buyer}%"",}}"