I'm trying to run this origins addon with other origins addons. I tested it under different situations because I wanted to know if it was incompatible with other addons. I found that even running on its own (with origins and pekui) loading a single player world produces java.lang.IllegalArgumentException: Payload may not be larger than 1048576 bytes.

The entire log is pasted below.
here.log

Try downloading XL Packets Fabric

Connectivity provides similar functionality for Forge