You should remove this:
Code:
client_print(0, print_chat, "[ZP] The extra item ^x04^"Herbs^" ^x01was made by ^x04nikhilgupta345.")
As it wont print colors in chat and will also cause spam in the player's chat everytime it is displayed instead display this in the motd
And
You should make all the menu global and make them all in the plugin init so that they are not created everytime when a player buys a herb or mixes it
This way the plugin will be alot more effecient
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