How to use Scripting Define Symbols in UnityLoader.js?

I should fix the game data download script and to do that I would like to use the Scripting Define Symbols but it doesn't work.
The error it gives me is:

Preprocessor error "ReferenceError: RELOAD_FILE_ON_FAIL is not defined" occured in file "UnityLoader/UnityLoader.js" at line 491 when evaluating expression "#if RELOAD_FILE_ON_FAIL"
(Use `node --trace-uncaught ...` to show where the exception was thrown)

UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

but the symbol is defined in Player Settings->Other Settings->Scripting Compilation->Scripting Define Symbols.

I changed UnityLoader.js like this:

  {{{ read("FetchWithProgressFix.js") }}}
  {{{ read("FetchWithProgress.js") }}}

How can I fix it?

Could someone help me please?

Could someone help me please?

Is there anyone who can help me?