openApi is not reachable when calling from the azure

**Describe the issue**
when I try to call the swagger endpoint no matter is RenderSwaggerUI or RenderSwaggerDocument is all return messages: "Could not load file or assembly 'Microsoft.VisualStudio.TestPlatform.ObjectModel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified." However is worked in the local environment. And been looking inside the code from function app, nowhere has been used Microsoft.VisualStudio.TestPlatform.ObjectModel

**To Reproduce**
Steps to reproduce the behavior:
1. Go to 'Azure Function'
2. Click on 'RenderSwaggerUI' under Functions
3. Click on 'Get Function URL' under Functions and copy the URL from _master (Host key)
4. See error

**Expected behavior**
Show swagger ui page.

**Environment (please complete the following information, if applicable):**
- OS: Windows
- Browser chrome
- Version latest