Remove save error message when no sites loaded yet

src/Site/SiteManager.py

@@ -57,7 +57,7 @@ def load(self, cleanup=True):
 
     def save(self):
         if not self.sites:
-            self.log.error("Save error: No sites found")
+            self.log.debug("Save: No sites found")
         s = time.time()
         data = {}
         # Generate data file