cerebrum(albany version) crash during startup

Describe the bug

cerebrum(albany version) crash during startup

To Reproduce

Steps to reproduce the behavior:

1. Start albany version cerebrum
2. cerebrum crash

Expected behavior

start up in normal

Screenshots

N/A

Log Information

(.venv-albany) wuwenxiangs-MacBook-Pro:cerebrum wuwenxiang$ python main.py 
2022-07-26 03:53:09 | ERROR | unable to fetch data from database
Traceback (most recent call last):
  File "/Users/wuwenxiang/local/github-openv2x/cerebrum/main.py", line 2, in <module>
    from transform_driver.app import App
  File "/Users/wuwenxiang/local/github-openv2x/cerebrum/transform_driver/app.py", line 20, in <module>
    from post_process_algo import post_process
  File "/Users/wuwenxiang/local/github-openv2x/cerebrum/post_process_algo/post_process.py", line 236, in <module>
    _generate_transformation_info()
  File "/Users/wuwenxiang/local/github-openv2x/cerebrum/post_process_algo/post_process.py", line 217, in _generate_transformation_info
    "epsg:4326", choose_epsg(rsu_info[rsu]["pos"]["lon"])
TypeError: string indices must be integers

(Pdb) p rsu_info
{'R328328': {'pos': '{"lon": 118.840897, "lat": 31.88335}', 'bias_x': 0.0, 'bias_y': 0.0, 'rotation': 0.0, 'reverse': 0, 'scale': 0.09}}
(Pdb) p rsu_info[rsu]["pos"]["lon"]
*** TypeError: string indices must be integers
(Pdb) p rsu
'R328328'
(Pdb) p rsu_info[rsu]
{'pos': '{"lon": 118.840897, "lat": 31.88335}', 'bias_x': 0.0, 'bias_y': 0.0, 'rotation': 0.0, 'reverse': 0, 'scale': 0.09}
(Pdb) p rsu_info[rsu]["pos"]
'{"lon": 118.840897, "lat": 31.88335}'
(Pdb) p rsu_info[rsu]["pos"]["lon"]
*** TypeError: string indices must be integers
(Pdb) import json
(Pdb) json.loads(rsu_info[rsu]["pos"])
{'lon': 118.840897, 'lat': 31.88335}

Desktop (please complete the following information):

• OS: N/A
• Browser: N/A
• Version: albany

Additional context

Add any other context about the problem here.