Preview is not shown in default project for Python Django stack

[Katka92]

Describe the bug

When the default project in Python Djnago stack is built, the web page is opened but the page is not here.

Che version

• latest - 7.3.1
• nightly
• other: please specify

Steps to reproduce

1. Create Python Django stack with default project
2. Run the application (run commands: install dependencies, migrate, run server)
3. The page is opened but not loaded correctly

Expected behavior

The page should be loaded correctly.

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Installation method

• chectl
  server:start --platform minikube -i eclipse/che-server:7.3.1 -t ${WORKSPACE}/deploy --k8spodreadytimeout=180000 --listr-renderer=verbose where the ${WORKSPACE} is a path to Che with 7.3.1 tag checkouted.
• che-operator
• minishift-addon
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• other: please specify

[RomanNikitenko]

[tolusha]

It is the case when web page doesn't work in preview and has to be opened in a separate tab.

[schwingkopf]

I get the exact same error, in preview as well as separate tab in firefox.

[ScrewTSW]

@tolusha Yes. It works outside of the preview, but because the site returns 404 HTML code, the Theia Preview just shows the usual 404 screen, even though the site also returns web page content.

I can see the proper web site in firefox and chrome, but Theia just has the blank 404 screen

[ScrewTSW]

I think there is also a same-origin policy set in the example which prevents the page to be loaded inside an iframe

[che-bot]

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Mark the issue as fresh with /remove-lifecycle stale in a new comment.

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Moderators: Add lifecycle/frozen label to avoid stale mode.