blender 2.81/2.17 pre1 sneak peek crashes

Blender 2.81/2.17pre1 running sneak peek crashes verge3d and errors pop up. I included a zip attachment link with file. I’m running Ubuntu 18.04 64bit Linux, Blender 2.81

https://gitlab.com/ijk4de/3d/raw/master/public/quaternion_rot_01_decal_final.blend.zip

zip blend file which causes crash
Errors below

… truncatedINFO: Starting glTF 2.0 export
DEBUG: Tangent attribute will not be exported for mesh “BezierCurve”
DEBUG: Tangent attribute will not be exported for mesh “Plane.002”
INFO: Extracting BezierCurve primitives
DEBUG: Adding primitive without splitting. Indices: 765300 Vertices: 127924
INFO: Primitives created: 1
INFO: Extracting Plane.002 primitives
DEBUG: Adding primitive without splitting. Indices: 6 Vertices: 4
INFO: Primitives created: 1
Traceback (most recent call last):
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/__init__.py”, line 148, in execute
return gltf2_export.save(self, context, exportSettings)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_export.py”, line 120, in save
generateGLTF(operator, context, exportSettings, glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_generate.py”, line 3343, in generateGLTF
generateMeshes(operator, context, exportSettings, glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_generate.py”, line 1489, in generateMeshes
primitive[‘material’] = get_or_create_default_material_index(glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_get.py”, line 646, in get_or_create_default_material_index
def_idx = gltf.getMaterialIndex(glTF, DEFAULT_MAT_NAME)
NameError: name ‘gltf’ is not defined

location: /snap/blender/34/2.81/scripts/modules/bpy/ops.py:201

location: /snap/blender/34/2.81/scripts/modules/bpy/ops.py:201
Error: Traceback (most recent call last):
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/__init__.py”, line 148, in execute
return gltf2_export.save(self, context, exportSettings)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_export.py”, line 120, in save
generateGLTF(operator, context, exportSettings, glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_generate.py”, line 3343, in generateGLTF
generateMeshes(operator, context, exportSettings, glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_generate.py”, line 1489, in generateMeshes
primitive[‘material’] = get_or_create_default_material_index(glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_get.py”, line 646, in get_or_create_default_material_index
def_idx = gltf.getMaterialIndex(glTF, Traceback (most recent call last):
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/custom_ui.py”, line 640, in execute
filepath=join(prev_dir, “sneak_peek.gltf”), export_sneak_peek = True)
File “/snap/blender/34/2.81/scripts/modules/bpy/ops.py”, line 201, in __call__
ret = op_call(self.idname_py(), None, kw)
RuntimeError: Error: Traceback (most recent call last):
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/__init__.py”, line 148, in execute
return gltf2_export.save(self, context, exportSettings)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_export.py”, line 120, in save
generateGLTF(operator, context, exportSettings, glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_generate.py”, line 3343, in generateGLTF
generateMeshes(operator, context, exportSettings, glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_generate.py”, line 1489, in generateMeshes
primitive[‘material’] = get_or_create_default_material_index(glTF)
File “/home/rt/Documents/My Documents/blender/addons/verge3d_2.17_pre/addons/verge3d/gltf2_get.py”, line 646, in get_or_create_default_material_index
def_idx = gltf.getMaterialIndex(glTF, DEFAULT_MAT_NAME)
NameError: name ‘gltf’ is not defined

location: /snap/blender/34/2.81/scripts/modules/bpy/ops.py:201

location: <unknown location>:-1

location: <unknown location>:-1