Hi, I have this error in my minecraft 1.19, how can I fix it?
And I have to add the same file to the server?

Make sure you´re on the latest Apple Skin and Minecraft Forge version for 1.19

Apple Skin is required on the server, for the saturation overlay to work. But the tooltip for food values on food, will still shows if it´s only on the client.

What @GirafiStudios said. Update Forge and/or AppleSkin.

This actually looks to be the same error as #192 (comment). So updating to AppleSkin v2.4.2 should fix it.