React app deploy fails with unsupported language error

I have recently created a static web app with the following command:

```shell
az staticwebapp create \
-n {NAME} \
-g {PROJECT} \
-s {REPO} \
-l WestUS2 \
-b master \
--app-artifact-location ".next" \
--token {TOKEN} \
--verbose
```

This command succeeded and resulted in a new GitHub Action being added to my project repository. The deploy action is, however, failing with the following error message:

```
...
Copying files to destination directory '/bin/staticsites/ss-oryx/api'...
Done in 3 sec(s).

Removing existing manifest file
Creating a manifest file...
Manifest file created.

Done in 42 sec(s).

---End of Oryx build logs---
The function language ',nodejspython' is unsupported or invalid. The following languages are valid: node, dotnet, python.
```

• next.js / react project
  
• workflow file:
  

  ```yaml

  name: Azure Static Web Apps CI/CD

  on:
  push:
  branches:
  - master
  pull_request:
  types: [opened, synchronize, reopened, closed]
  branches:
  - master

  jobs:
  build_and_deploy_job:
  if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.action != 'closed')
  runs-on: ubuntu-latest
  name: Build and Deploy Job
  steps:
  - uses: actions/checkout@v2
  with:
  submodules: true
  - name: Build And Deploy
  id: builddeploy
  uses: Azure/static-web-apps-deploy@v0.0.1-preview
  with:
  azure_static_web_apps_api_token: ${{ secrets.AZURE_STATIC_WEB_APPS_API_TOKEN_WHITE_SAND_091D5411E }}
  repo_token: ${{ secrets.GITHUB_TOKEN }} # Used for Github integrations (i.e. PR comments)
  action: 'upload'
  ###### Repository/Build Configurations - These values can be configured to match you app requirements. ######
  # For more information regarding Static Web App workflow configurations, please visit: https://aka.ms/swaworkflowconfig
  app_location: '.' # App source code path
  api_location: '.' # Api source code path - optional
  app_artifact_location: '.next' # Built app content directory - optional
  ###### End of Repository/Build Configurations ######
  ```