replace old warning module with new logger warning

template/engine/session.py

@@ -133,10 +133,10 @@ class Session(object):
                 logger.info("Loading file complete")
                 return Data.instanceFromSerializedData(parentSession=self, serializedData=result)
             else:
-                warn(f"""{absoluteJsonFilePath} was saved with {result["version"]} but we need {METADATA["version"]}""")
+                logger.warning(f"""{absoluteJsonFilePath} was saved with {result["version"]} but we need {METADATA["version"]}""")
                 sysexit()
         else:
-            warn(f"""Error. {absoluteJsonFilePath} not loaded. Not a sane {METADATA["name"]} file in json format""")
+            logger.warning(f"""Error. {absoluteJsonFilePath} not loaded. Not a sane {METADATA["name"]} file in json format""")
             sysexit()