glTF exporter: fix bug when invalid shapekey driver

io_scene_gltf2/__init__.py

@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (1, 7, 11),
+    "version": (1, 7, 12),
     'blender': (2, 91, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py

@@ -51,7 +51,11 @@ def get_sk_drivers(blender_armature):
         idx_channel_mapping = []
         all_sorted_channels = []
         for sk_c in child.data.shape_keys.animation_data.drivers:
-            sk_name = child.data.shape_keys.path_resolve(get_target_object_path(sk_c.data_path)).name
+            # Check if driver is valid. If not, ignore this driver channel
+            try:
+                sk_name = child.data.shape_keys.path_resolve(get_target_object_path(sk_c.data_path)).name
+            except:
+                continue
             idx = shapekeys_idx[sk_name]
             idx_channel_mapping.append((shapekeys_idx[sk_name], sk_c))
         existing_idx = dict(idx_channel_mapping)