Created a modded server, game keeps crashing when opening creative inventory

[aaeong]

Hello! Can anyone help? Whenever I open my inventory in creative on my 1.21 modded server, the game crashes! here is my crash log link: https://pastebin.com/EGwh5inY

[TileEntity]

Remove these one by one
 

screenshotclipboard
cubes-without-borders
smoothboot

If there is no change, add the new crash-report or latest.log from your logs-folder