/reload failed (1.20.1)

[coucoul38]

When I do /reload it says "Reload failed; Keeping old data."
I looked at the logs and it seems to be an issue with the mod

When I save and restart the world, my datapack is loaded as expected.

Here's the relevent part of the log:
reload failed log.txt

[MerchantPug]

ah. I must've forgotten to register that packet.

I'll have a fix out sometime in the future.