title: Unable to run Flask app on Azure App ImportError: libgthread-2.0.so.0
body: <p>I tried changing opencv-python to opencv-python-headless too but no effect on the error. I am linking GitHub to the deployment center.</p>
  <p>Even tried adding libgthread-2.0 to the <code>requirements.txt</code> but of no use.</p>
  <pre><code>  File &quot;/tmp/8d994faa0eee02e/app.py&quot;, line 3, in &lt;module&gt;
    2021-10-22T01:34:07.264279725Z     import os, sys, cv2, glob
    2021-10-22T01:34:07.264282925Z   File &quot;/tmp/8d994faa0eee02e/antenv3.6/lib/python3.6/site-packages/cv2/__init__.py&quot;, line 5, in &lt;module&gt;
    2021-10-22T01:34:07.264286525Z     from .cv2 import *
    2021-10-22T01:34:07.264289725Z ImportError: libgthread-2.0.so.0: cannot open shared object file: No such file or directory
    2021-10-22T01:34:07.272103487Z [2021-10-22 01:34:07 +0000] [39] [INFO] Worker exiting (pid: 39)
    2021-10-22T01:34:07.401211514Z [2021-10-22 01:34:07 +0000] [36] [INFO] Shutting down: Master
    2021-10-22T01:34:07.402045221Z [2021-10-22 01:34:07 +0000] [36] [INFO] Reason: Worker failed to boot.
  </code></pre>
  <p>What should I do to get rid of this error?</p>