An effect part of the condeff should be AndEffect and not And.

pddl/parser/domain.py

@@ -287,7 +287,7 @@ def cond_effect(self, args):
         """Process the 'cond_effect' rule."""
         if len(args) >= 3 and args[1] == Symbols.AND.value:
             p_effects = args[2:-1]
-            return And(*p_effects)
+            return AndEffect(*p_effects)
         assert_(len(args) == 1)
         return args[0]