# Plesk error when creating a Let's Encrypt certificate

**URL:** <https://community.letsencrypt.org/t/plesk-error-when-creating-a-lets-encrypt-certificate/25568>\
**Category:** Help\
**Created:** [January 12, 2017, 3:24pm UTC](https://community.letsencrypt.org/t/plesk-error-when-creating-a-lets-encrypt-certificate/25568 "2017-01-12T15:24:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ramtar](https://avatars.discourse-cdn.com/v4/letter/r/aeb1de/32.png) [@ramtar](https://community.letsencrypt.org/u/ramtar)\
**Post date:** [January 12, 2017, 3:24pm UTC](https://community.letsencrypt.org/t/plesk-error-when-creating-a-lets-encrypt-certificate/25568/1 "2017-01-12T15:24:46Z")

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Hello, I have a server with Plesk Onyx 17.0.17 under Centos 6.8 and the let’s encrypt module installed.

I’m getting the following error message when trying to create a let’s encrypt for any of the domains hosted in the server:

Error: Let’s Encrypt SSL certificate installation failed: Failed letsencrypt execution: Traceback (most recent call last):  
File “/usr/local/psa/var/modules/letsencrypt/venv/bin/certbot”, line 11, in \<module\>  
sys.exit(main())  
File “/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages/certbot/main.py”, line 825, in main  
plugins = plugins\_disco.PluginsRegistry.find\_all()  
File “/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages/certbot/plugins/disco.py”, line 183, in find\_all  
plugin\_ep = PluginEntryPoint(entry\_point)  
File “/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages/certbot/plugins/disco.py”, line 34, in **init**  
self.plugin\_cls = entry\_point.load()  
File “/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages/pkg\_resources/ **init**.py”, line 2290, in load  
self.require(\*args, \*\*kwargs)  
File “/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages/pkg\_resources/ **init**.py”, line 2307, in require  
items = working\_set.resolve(reqs, env, installer)  
File “/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages/pkg\_resources/ **init**.py”, line 854, in resolve  
raise VersionConflict(dist, req).with\_context(dependent\_req)  
ContextualVersionConflict: (cryptography 1.3.1 (/usr/local/psa/var/modules/letsencrypt/venv.FST07/lib/python2.7/site-packages), Requirement.parse(‘cryptography\>=1.3.4; extra == “security”’), set([‘requests’]))

Already tried to uninstall/reinstall the module but problem persists.

How can I solve this this? Anyone can help me please?

Thanks

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**Author:** ![AYamshanov](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/ayamshanov/32/10552_2.png) [@AYamshanov](https://community.letsencrypt.org/u/AYamshanov)\
**Post date:** [January 13, 2017, 5:12am UTC](https://community.letsencrypt.org/t/plesk-error-when-creating-a-lets-encrypt-certificate/25568/2 "2017-01-13T05:12:27Z")

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Hi,

[https://github.com/plesk/letsencrypt-plesk/issues/141](https://github.com/plesk/letsencrypt-plesk/issues/141) - the dependency has been fixed - try to reinstall the extension

AYamshanov

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\
**Post date:** [February 12, 2017, 5:18am UTC](https://community.letsencrypt.org/t/plesk-error-when-creating-a-lets-encrypt-certificate/25568/3 "2017-02-12T05:18:06Z")

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