Linux/Python Functions fails to produce app content zips for Download

#### Investigative information

Please provide the following:

- Timestamp:
- Function App version (1.0 or 2.0): 2.0.12304.0 (~2)
- Function App name: snyk-fixtures-func5-python
- Function name(s) (as appropriate):
- Invocation ID:
- Region: West US

#### Repro steps

Provide the steps required to reproduce the problem:

1. Using VS Code Azure Functions extension, create a new Python Function Project
2. Deploy the function
3. Go to function page in portal
4. Hit `Download app content`


#### Expected behavior

Provide a description of the expected behavior.

After hitting Download app content, a zip with all function code should be available

#### Actual behavior

Provide a description of the actual behavior observed.

Hitting `Download app content` fails to produce the zip file, with an HTTP Error


#### Known workarounds

#### Related information

Provide any related information

* Programming language used: Python
* Links to source
* Bindings used

Reproduce the failure by creating and deploying a Python Function Project with the VS Code Azure Functions extension, then use the Azure portal's Download app content action. Start by tracing the Azure Functions host path that serves this download and capture the HTTP error; done means the deployed function code downloads as a zip.

Written by the indexing model from the issue text.