Fixed #26281 -- Added a helpful error message for an invalid format specifier to dateformat.format().

django/template/defaultfilters.py

@@ -767,10 +767,10 @@ def time(value, arg=None):
         return ''
     try:
         return formats.time_format(value, arg)
-    except AttributeError:
+    except (AttributeError, TypeError):
         try:
             return time_format(value, arg)
-        except AttributeError:
+        except (AttributeError, TypeError):
             return ''