Python backend disconnected in version 2.16.1-stable.713

[windengineer0]

Describe the bug
A new installation of the latest stable version results in the "Python backend disconnected" message. Looking in the python-server.log file, it appears to be a ModuleNotFoundError.

With this being disconnected, it is not possible to perform basic tasks such as uploading a new version of an application package (Error: "Unable to extract accountName with provided information.")

To Reproduce
Steps to reproduce the behavior:

1. Log into BatchExplorer
2. Click on Python Backend message at the bottom bar.

Expected behavior
In version 2.15.0-stable.634, "Python service is connected and running".

Screenshots
N/A

Logs(Click profile > View Logs > app.log, client.log)

info: ========================= STARTING PYTHON RPC SERVER PROCESS =========================
info: Traceback (most recent call last):
  File "main.py", line 8, in <module>

info:   File "PyInstaller\loader\pyimod03_importers.py", line 495, in exec_module

info:   File "server\websocket_server.py", line 4, in <module>

info:   File "PyInstaller\loader\pyimod03_importers.py", line 495, in exec_module

info:   File "jsonrpc\__init__.py", line 6, in <module>

info:   File "PyInstaller\loader\pyimod03_importers.py", line 495, in exec_module

info:   File "jsonrpc\request.py", line 5, in <module>

info:   File "PyInstaller\loader\pyimod03_importers.py", line 495, in exec_module

info:   File "server\aad_auth.py", line 1, in <module>

info:   File "PyInstaller\loader\pyimod03_importers.py", line 495, in exec_module

info:   File "azext\batch\__init__.py", line 6, in <module>

info:   File "PyInstaller\loader\pyimod03_importers.py", line 495, in exec_module

info:   File "azext\batch\batch_extensions_client.py", line 14, in <module>

info: ModuleNotFoundError: No module named 'azure.multiapi'
[3712] Failed to execute script
info:  'main' due to 
info: unhandled exception!

Version (please complete the following information):

• OS: Windows 10 Enterprise
• Version 21H2
• Build 19044.2486

[dpwatrous]

+@gingi