Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Error arises on opening published exploration on local server

See original GitHub issue

Description Error 500 arises on opening published exploration on local server.

To Reproduce Steps to reproduce the behavior:

Create an exploration.
Publish it.
Open the exploration from the library or it’s link.
See error

Observed behavior

Expected behavior No error should arise. The exploration should play.

Server log

INFO     2019-02-05 20:39:03,571 stubs.py:51] Sandbox prevented access to static file "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/templates/dev/head/pages/exploration_player/feedback_popup_container_directive.html"
INFO     2019-02-05 20:39:03,571 stubs.py:52] Check that `application_readable: true` is set in app.yaml
INFO     2019-02-05 20:39:03,575 base.py:478] Traceback (most recent call last):
  File "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia_tools/google_appengine_1.9.67/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/domain/acl_decorators.py", line 97, in test_can_play
    return handler(self, exploration_id, **kwargs)
  File "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/controllers/reader.py", line 237, in get
    'pages/exploration_player/exploration_player.html')
  File "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/controllers/base.py", line 399, in render_template
    self.jinja2_env.get_template(filepath).render(**values))
  File "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia_tools/google_appengine_1.9.67/google_appengine/lib/jinja2-2.6/jinja2/environment.py", line 894, in render
    return self.environment.handle_exception(exc_info, True)
  File "/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/templates/dev/head/pages/exploration_player/exploration_player.html", line 1, in top-level template code
    {% extends 'pages/base.html' %}
IOError: [Errno 13] file not accessible: '/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/templates/dev/head/pages/exploration_player/feedback_popup_container_directive.html'

ERROR    2019-02-05 20:39:03,575 base.py:488] Exception raised: [Errno 13] file not accessible: '/media/hackerpro/871501f2-df6c-4a21-a03c-8b8e22d001d4/PROJECTS/GSOC/oppia/oppia/core/templates/dev/head/pages/exploration_player/feedback_popup_container_directive.html'
INFO     2019-02-05 20:39:03,689 module.py:835] default: "GET /explore/bv6mm4uWaYKq HTTP/1.1" 500 21311

NOTE This error does not arise when server is run with the --prod_env flag.