Here is the raw stack trace:

Traceback (most recent call last):
line 550, in GetUserAppAndServe
    app, mod_file = self.GetUserApp(script)
line 411, in GetUserApp
    app = _AppFrom27StyleScript(script)
line 271, in _AppFrom27StyleScript
    app, filename, err = wsgi.LoadObject(script)
  File "/home/vmagent/python_vm_runtime/google/appengine/runtime/", line 
85, in LoadObject
    obj = __import__(path[0])
ImportError: No module named PLACEHOLDER

After a recent deploy to AppEngine flexable i get this spammed in the server 

I have a very simple app.yaml - 

runtime: python27
vm: true
threadsafe: true
entrypoint: gunicorn -b :$PORT main:app

I have no idea why this is coming up or even how to start debugging. Any help 
would be greatly appriciated. Thank you

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