• I have a similar issue to #14.
  The crash happens when loading an existing world, but there is a different crash:
• Fluidloged API 1.4: https://paste.dimdev.org/kewaparowi.mccrash
• Fluidloged API 1.43: https://paste.dimdev.org/kazalanuqo.mccrash
  • Fluidloged API 1.4, latest.log: https://paste.ee/p/501rd
  • Without Fluidloged API, there is no crash.

This happened to my world that used to have the Fluidloged API installed. Then I removed it because of #12.
And then when I added the mod back, both versions 1.4 and 1.43 crashed.
The crash happens a few seconds after joining the world, so I move around a little bit and then boom, crash.

fixed in v1.5!