Building documentation from source

I want to use a local copy of ue4 documentation. On forum (and in docs) says I should use a UnrealDocTool for this.
In all last releases (since 4.16) you provide documentation sources in .udn format but you exclude UnrealDocTool itself. Okay. I’m download UnrealDocTool source from old release and successfully build it (after adding all missing libraries), without andy issues (0 errors and warnings).
When I’m trying to start UnrealDocTool .exe all what I get it’s a error about missing path.

Unhandled Exception: System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\Program Files\Epic Games\UE_4.22\Engine\Documentation\Source\Include\Internationalization'.

My next step is adding missing folders.

Now, when I’m start UnrealDocTool I always crash with

handled Exception: System.UnauthorizedAccessException: Could not open language file. 

As I understand, UnrealDocTool needed a special .csv file with some languages data (maybe from Doxygen or etc) but I dont know
where I can get it. Without this language file UnrealDocTool absolutley useless. I even can’t build a single file. I’m trying all commands from this docs:

If you provide access to .udn sources why you dont provide access to buuilding tools at now? And why you ignore this problem for the years? Or this way of building docs is outdated and i should use another one?