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[1.16.5] Error when execute my custom command with custom argument (Expected whitespace to end one argument, but found trailing)

Luis_ST
in Modder Support

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Posted

I created a custom command with custom argument.
The command works but when I execute the part with my argument I get the following CommandException: 

[09:50:51] [Render thread/INFO] [minecraft/NewChatGui]: [CHAT] Expected whitespace to end one argument, but found trailing data
[09:50:51] [Render thread/INFO] [minecraft/NewChatGui]: [CHAT] ...k set Dev bedwars:server_admin<--[HERE]

what exactly does this error mean?

this is my command class
this is my command argument class

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