Version: 2.6.1
Author: Me
Addons: SkBee (I don't think it is relevant)
Extra Info:
The first time I try to move it, the script stops it, but the second time the script doesn't stop it. The third time, the script stops it, the fourth time, the script doesn't stop it. Etc.

Code:
https://pastebin.com/fGiRwibW
or

every 0.01 seconds:
loop all players:
if slot 8 of loop-player's inventory is not nether star:
if loop-player's inventory contains nether star named "&aSkyBlock Menu &7(Right Click)" with lore "&7View all of your SkyBlock" and "&7progress, including your Skills," and "&7Collections, Recipes, and more!" and "" and "&eClick to open!":
remove 1 nether star from loop-player's inventory
set slot 8 of loop-player's inventory to nether star named "&aSkyBlock Menu &7(Right Click)" with lore "&7View all of your SkyBlock" and "&7progress, including your Skills," and "&7Collections, Recipes, and more!" and "" and "&eClick to open!"
on right click:
if player's tool is nether star:
if uncolored name of player's tool is "SkyBlock Menu (Right Click)":
open chest inventory with 6 rows named "SkyBlock Menu" to player
set slot 0 of player's current inventory to gray stained glass pane named " "
set slot 1 of player's current inventory to gray stained glass pane named " "
set slot 2 of player's current inventory to gray stained glass pane named " "
set slot 3 of player's current inventory to gray stained glass pane named " "
set slot 4 of player's current inventory to gray stained glass pane named " "
set slot 5 of player's current inventory to gray stained glass pane named " "
set slot 6 of player's current inventory to gray stained glass pane named " "
set slot 7 of player's current inventory to gray stained glass pane named " "
set slot 8 of player's current inventory to gray stained glass pane named " "
set slot 9 of player's current inventory to gray stained glass pane named " "
set slot 10 of player's current inventory to gray stained glass pane named " "
set slot 11 of player's current inventory to gray stained glass pane named " "
set slot 12 of player's current inventory to gray stained glass pane named " "
set {playerhead} to a player head
add "{SkullOwner:%player%}" to nbt of {playerhead}
set slot 13 of player's current inventory to {playerhead} named "&aYour SkyBlock Profile"
on inventory click:
if name of event-inventory is "SkyBlock Menu":
if index of event-slot is 13:
send "test" to player
else:
cancel event

I appreciate the help!

 

Oh yes, thankyou so much! This makes a lot of sense and I can learn a lot from this! Thanks

--- Double Post Merged, Mar 15, 2022, Original Post Date: Mar 15, 2022 ---

Oh by the way, the head thing is because of SKBee, Thanks ShaneBee!