Plugin Installer fails with CERTIFICATE_VERIFY_FAILED: unable to search for or install plugins
I do not know why this happens on one of my computers, because I have installed Gajim on many devices flawlessly, but on this one the plugin installer is not able do download the plugins list, and even if i download a plugin as zip, Gajim says broken archive (which is not true). There are no warnings or messages in the GUI, only in the logfile:
01.03.2017 18:35:39 (E) gajim.plugin_system: Error fetching plugin list
Traceback (most recent call last):
File "../Plugins\plugin_installer\plugin_installer.py", line 543, in run
buf = self.plugin.retrieve_path(self.plugin.server_folder, 'manifests_images.zip')
File "../Plugins\plugin_installer\plugin_installer.py", line 141, in retrieve_path
request = urllib2.urlopen(uri)
File "C:\Python27\lib\urllib2.py", line 154, in urlopen
File "C:\Python27\lib\urllib2.py", line 429, in open
File "C:\Python27\lib\urllib2.py", line 447, in _open
File "C:\Python27\lib\urllib2.py", line 407, in _call_chain
File "C:\Python27\lib\urllib2.py", line 1241, in https_open
File "C:\Python27\lib\urllib2.py", line 1198, in do_open
URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)>
The same installer worls on other computers in the same network.