Mod not working check screenshot - http://prntscr.com/pk8uou

What other mods are you using?
If some mods decided to remove vanilla biter and spitter spawners, they will cause such conflict.

I ran this mod separately from all mods, on a clean game, the error is the same

Checked all versions of the game. Works in version 1.71. Experimental

What is the game version and mod version you are using?
1.71? Do you mean game version 0.17.71?

Yes, I'm sorry, it is on this version of the game that the mod goes as usual (0.17.71)

To fix it, it is necessary to delete all the files of the game, from the C drive and Where the main folder with the game is, a complete reinstallation as a whole. Thank you very much for responding

Alright, seems like it comes from file corruption... But good to hear it is solved now.
BTW, if you are using Steam version, you can look for "Check File Integrity" under game right click menu. This may save you from having to do manual deletion.