variabole name typo

python_package/src/onlinemid/utils/image_plotting.py

@@ -170,7 +170,7 @@ class OnlinePlotHandler():
         pass
 
     def save(self, hash=None, filename=None, key=None, plotter_args=None):
-        if key is None or args is None:
+        if key is None or plotter_args is None:
             print("Error in OnlinePlotHandler:save() function, key and args must be given ")
 
         if not self.is_key_registered(key):