XUiC Fall-Through Error Caused by Systems Without Windows Defender Enabled 

If Randomize Memory Allocations (Bottom-up ASLR) is turned off, Harmony may fail to patch methods correctly. This can cause null pointer errors as soon as a patched method is called.

Fix 1: Turn ASLR On

1. Open Windows Settings
   
   

2. Search for Exploit Protection
   
   

3. Find Randomize Memory Allocations (Bottom-up ASLR)
   
   

4. Set it to either:
   
   

   • On by default
     
     

   • Use default (On)
     
     

Fix 2: Registry Edit

If the ASLR setting cannot be changed in Windows, a registry value may be blocking it.

1. Press Windows key + R
   
   

2. Type regedit and press Enter
   
   

3. Go to:
   
   

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\App and Browser protection

4. Find:
   
   

DisallowExploitProtectionOverride

5. Change the hex value from:
   
   

1 to 0

6. Restart the PC
   
   

After restarting, launch the game again.

Important
Only edit the registry carefully. Changing the wrong value can cause other issues.