Set the current working directory in gendoc.py to the script directory as that is where it expects to be run

scripts/gendoc.py

@@ -8,6 +8,8 @@ import shutil
 import subprocess
 import sys
 
+os.chdir(os.path.dirname(__file__))
+
 stylesheets = {
     "stylesheet_path": ["basic.css", "nature.css"]
 }