@initiator does not exist when used through /execute

In the NPC menu whenever I click a button hooked up to the command ("execute if entity @s[tag=available] run tellraw @initiator {"rawtext":[

{"text":"§l§bConsol: §r§fThis plot is §anow yours§f!"}

]}") it doesnt send the message, however doing the same exact command with nothing but the tellraw selector changed to "@p" works just fine.

Please fix this 🙏