Now if your gamemode is creative, the gui can't be opened
Add message when set effect /bbea set <Player> <Effect> to sender (Message can't be changed)
please understand if there are bugs, because I tried to support 1.8 - 1.17.1, because previously it only supported 1.8 - 1.12.2, and most importantly, don't report bugs in the review, please contact me, I will try my best to fix it, thank you!