omit read protected directory when checking for changes in the beginning

engine/watcher.py

@@ -31,8 +31,12 @@ from engine.start import PATHS
 def fast_scandir(dir):    
     """
     Get all subdirectories recursively.
-    https://stackoverflow.com/questions/973473/getting-a-list-of-all-subdirectories-in-the-current-directory"""
-    subfolders= [f.path for f in os.scandir(dir) if f.is_dir()]
+    https://stackoverflow.com/questions/973473/getting-a-list-of-all-subdirectories-in-the-current-directory"""    
+    try:
+        subfolders= [f.path for f in os.scandir(dir) if f.is_dir()] 
+    except PermissionError:        
+        subfolders = []    
+        
     for dir in list(subfolders):
         subfolders.extend(fast_scandir(dir))
     return subfolders