My game keeps crashing and saying The following:

The game crashed whilst rendering overlay
Error: java.lang.NullPointerException: Registry Object not
present: minecraft:empty
Exit Code: -1

This happens after the game goes into full screen but before the main menu can load.
Crash Report Here

What do you mean by "the new Fluid API."

 

There was a pull request on GitHub to add a new system for custom Fluids (API), to make them to more customizable for Modders.
These new system, requires an implementation of a new method in modded Fluids.
Mods of older 1.19 version do not have these new Fluid API, since the new system is not compatible (new methd) with the old one, you get the error

so i need fluid api?

so its not something i can fix right now? i have to wait for the people to fix it

exactly

so how do i know what mods to remove so i can play the game?

 

You must remove all Mods that add custom Fluids that have not been updated yet.

Unfortunately, you have to test each mod individually, to find out if the Mod has been updated of not

i understand, thank you for helping.