'int' object is not iterable : TypeError at /data_cube_manager/dataset_types/view/1

[iliang]

Hi, I have set up data_cube_ui and ingest landsat images, when I run view definition, I get the error message.
TypeError at /data_cube_manager/dataset_types/view/1
'int' object is not iterable
Request Method: GET
Request URL: http://data_cube_manager/dataset_types/view/1
Django Version: 1.11.13
Exception Type: TypeError
Exception Value:
'int' object is not iterable
Exception Location: /home/localuser/Datacube/data_cube_ui/apps/data_cube_manager/utils.py in forms_from_definition, line 83
Python Executable: /usr/bin/python3
Python Version: 3.6.6
Python Path:
['/home/localuser/Datacube/data_cube_ui',
'/home/localuser/miniconda3/envs/cubeenv/lib/python36.zip',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/lib-dynload',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/datacube-1.6.1+121.ge40ff90.dirty-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/toolz-0.9.0-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/python_dateutil-2.7.4-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/Click-7.0-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/affine-2.2.1-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/snuggs-1.4.2-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/cligj-0.5.0-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/attrs-18.2.0-py3.6.egg',
'/home/localuser/miniconda3/envs/cubeenv/lib/python3.6/site-packages/pyparsing-2.2.2-py3.6.egg',
'/']
Server time: Fri, 9 Nov 2018 17:58:41 -0500