fixed planar_face_tolerance context bug

Author: piotrkluba

flow360/component/simulation/validation/validation_context.py

@@ -226,9 +226,16 @@ def _get_global_bounding_box(cls, param_as_dict: dict):
 
     @classmethod
     def _get_planar_face_tolerance(cls, param_as_dict: dict):
-        planar_face_tolerance = get_value_with_path(
-            param_as_dict, ["meshing", "defaults", "planar_face_tolerance"]
-        )
+        planar_face_tolerance = None
+        if "meshing" in param_as_dict and param_as_dict["meshing"]:
+            if param_as_dict["meshing"]["type"] == "MeshingParams":
+                planar_face_tolerance = get_value_with_path(
+                    param_as_dict, ["meshing", "defaults", "planar_face_tolerance"]
+                )
+            else:
+                planar_face_tolerance = get_value_with_path(
+                    param_as_dict, ["meshing", "volume_meshing", "planar_face_tolerance"]
+                )
         return planar_face_tolerance
 
     @classmethod