The game becomes highly sluggish after the Unity engine update

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1

  1. The game experiences significant lag when pressing the TAB key to toggle the map.

  2. Critical frame drops occur during the boss’s spellcasting animations.

It’s not just me—many friends have also encountered this issue.

After consulting a programming-savvy friend, we identified the issue as being caused by null reference exceptions.

The error message is as follows:

[Error : Unity] 2025-03-23T11:10:24.3954993+00:00 Exception System.NullReferenceException: Object reference not set to an instance of an object.
at UISubScaler.UpdateTextScale (System.Single scale) [0x00000] in <00000000000000000000000000000000>:0
at UISubScaler.UpdateScale () [0x00000] in <00000000000000000000000000000000>:0
at UISubScaler.OnEnable () [0x00000] in <00000000000000000000000000000000>:0
at UIPanel.Open (System.Boolean useCanvas) [0x00000] in <00000000000000000000000000000000>:0
at UIBase.OverlayMapKeyDown () [0x00000] in <00000000000000000000000000000000>:0
at EpochInputManager.HandleButtonPress (UnityEngine.Vector3 hitVector) [0x00000] in <00000000000000000000000000000000>:0
at EpochInputManager.Update () [0x00000] in <00000000000000000000000000000000>:0

2

Just a quick guess. You are back to the game, updated from 1.1.(1-6) or even from 1.0.X to the current version and this happens, yes? - try to check game files from steam settings menu or reinstall LE

3

I upgraded from version 1.16 to 1.17. After experiencing stuttering issues, I reinstalled the game and checked game files from steam settings menu, but the problem persists, so I went AFK. I hope you can investigate the cause, as many of my friends are also encountering this issue.