Hello nikuscraft55
Are you joining with a certain Client (Badlion, Lunar, etc.)? If so please make sure that WorldEditCUI is turned off, and in case you are on Badlion, please also make sure that you launch without BLC3.
Feel free to contact me on the forums or on discord [Lavendel#4574] if you need further assistance. Have a nice day/night!
Sincerely,
Lavendel