glTF exporter: Fix shapekeys export on skinned meshes

io_scene_gltf2/__init__.py

@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (0, 9, 70),
+    "version": (0, 9, 71),
     'blender': (2, 81, 6),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/exp/gltf2_blender_extract.py

@@ -771,7 +771,7 @@ def extract_primitives(glTF, blender_mesh, blender_object, blender_vertex_groups
                             temp_normals[blender_polygon.index * 3 + 0], temp_normals[blender_polygon.index * 3 + 1],
                             temp_normals[blender_polygon.index * 3 + 2])
 
-                    n_morph = convert_swizzle_normal_and_tangent(n_morph, armature, blender_object, export_settings)
+                    n_morph = convert_swizzle_normal_and_tangent(Vector(n_morph), armature, blender_object, export_settings)
 
                     # Store delta.
                     n_morph -= n