Install issue with OctoPrint 1.3.6

[dnewman-polar3d]

Brand new 0.14 Octopi image. Updated to 1.3.6 release.

Then install the Polar Cloud plugin. Install runs fine and goes to completion with no errors. Success is declared. However, OctoPrint then says "Plugin Installed. A plugin was installed successfully, however it was impossible to detect which one. Please Restart OctoPrint to make sure everything will be registered properly."

Clicking the "Restart now" button does a restart. Once OctoPrint is back up, there is no sign whatsoever of the plugin being installed and thus it is not possible to enable it.

Repeat.... The install of the plugin goes really fast the second time as the libraries are already installed. The isntall declares success again. However, same message from OctoPrint about needing to restart. After the restart, no sign of the plugin.

[dnewman-polar3d]

2017-12-13 00:54:55,161 - octoprint.plugins.pluginmanager - INFO - Installing plugin from https://github.com/markwal/OctoPrint-PolarCloud/archive/master.zip
2017-12-13 00:57:50,583 - py.warnings - WARNING - /home/pi/oprint/local/lib/python2.7/site-packages/OctoPrint-1.3.6-py2.7.egg/octoprint/plugin/core.py:1538: UserWarning: No PKG-INFO found for package: octoprint_polarcloud
  warnings.warn('No PKG-INFO found for package: %s' % self.package_name)

2017-12-13 00:57:50,614 - octoprint.plugin.core - ERROR - Error loading plugin polarcloud
Traceback (most recent call last):
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OctoPrint-1.3.6-py2.7.egg/octoprint/plugin/core.py", line 732, in _import_plugin
    instance = imp.load_module(key, f, filename, description)
  File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint_polarcloud/__init__.py", line 43, in <module>
    from OpenSSL import crypto
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OpenSSL/crypto.py", line 12, in <module>
    from cryptography import x509
  File "/home/pi/oprint/local/lib/python2.7/site-packages/cryptography/x509/__init__.py", line 7, in <module>
    from cryptography.x509 import certificate_transparency
  File "/home/pi/oprint/local/lib/python2.7/site-packages/cryptography/x509/certificate_transparency.py", line 8, in <module>
    from enum import Enum
ImportError: No module named enum
2017-12-13 00:57:50,629 - octoprint.plugins.pluginmanager - WARNING - The plugin was installed successfully, but couldn't be found afterwards to initialize properly during runtime. Please restart OctoPrint.
2017-12-13 00:58:04,239 - octoprint.server.api.system - INFO - Performing command for core:restart: sudo service octoprint restart
2017-12-13 00:58:04,384 - octoprint.server - INFO - Shutting down...
2017-12-13 00:58:05,281 - octoprint.events - INFO - Processing shutdown event, this will be our last event
2017-12-13 00:58:05,293 - octoprint.events - INFO - Event loop shut down
2017-12-13 00:58:05,305 - octoprint.server - INFO - Goodbye!
2017-12-13 00:58:10,198 - octoprint.startup - INFO - ******************************************************************************
2017-12-13 00:58:10,199 - octoprint.startup - INFO - Starting OctoPrint 1.3.6
2017-12-13 00:58:10,200 - octoprint.startup - INFO - ******************************************************************************
2017-12-13 00:58:11,909 - octoprint.startup - INFO - Blacklist processing done

[dnewman-polar3d]

FYI, no difference if I do

source ~/oprint/bin/activate
pip install -U setuptools

and then try to install again. Same error.

[dnewman-polar3d]

Was fixed by Commit 1af41c2.