1.21.11 Crash when opening inventory

[07Productions]

Describe the bug
Disconnecting when opening a players inventory

Internal Exception: io.netty.handler.codec.EncoderException: Failed to encode packet 'clientbound/minecraft:container_set_content'

To Reproduce
Steps to reproduce the behavior:
Do command on a player (/view User inv)
Connection Lost

Screenshots

Device Info(please complete the following information):

• Windows
• 1.21.11
• 1.4.19
  Additional context
  Was working yesterday when I installed the mod, now today it is not working