Minecraft Version: 1.20.1

Forge Version: 47.2.32

FLIB Mod Version: 0.0.13
Cyclic Mod Version: 1.12.9

Single Player or Server: Single Player

Describe problem (what you were doing; what happened; what should have happened):

Latest version of FLIB with Cyclic causes immediate CTD upon joining the world

ReportedException: Ticking player
NoSuchFieldError: STEP_HEIGHT

Use of Neruina (Ticking Entity Fixer) causes the player to be kicked instead of a crash

FLIB Mod Version: 0.0.12 does not cause a crash

Log file link:
https://pastebin.com/2Er8kJnj

Hello.
After updating your mod from version 1.20.1 - 0.0.12 to version 1.20.1 - 0.0.13, I was no longer allowed to join the server.
I attach files from the server and client below:
from the server:
debug.log
latest.log

from the client:
latest.log

Thank you

This issue is most talked about under Cyclic #2410
For more information/logs/repeatability check there

Same issue with my modpack, I was unable to update flib without causing crashes.

same

Update to the latest versions of everything to get the fix. Specifically

Neoforge 47.1.99+

OR
‌

(old)forge 47.1.47+
and

cyclic 1.20.1-1.12.9

flib 0.0.14

Fixed compatibility with old-forge as of https://www.curseforge.com/minecraft/mc-mods/flib/files/5495793