# Error in installing cert-issuer

**URL:** <https://community.blockcerts.org/t/error-in-installing-cert-issuer/1794>\
**Category:** Technical\
**Created:** [March 27, 2019, 4:28am UTC](https://community.blockcerts.org/t/error-in-installing-cert-issuer/1794 "2019-03-27T04:28:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Praveena](https://avatars.discourse-cdn.com/v4/letter/p/49beb7/32.png) [@Praveena](https://community.blockcerts.org/u/Praveena)\
**Post date:** [March 27, 2019, 4:28am UTC](https://community.blockcerts.org/t/error-in-installing-cert-issuer/1794/1 "2019-03-27T04:28:34Z")

</div>

Hi,  
When I am trying to install cert-issuer  
\*I have tried running the below command:  
pip3 installed cert-issuer  
It is showing the error  
Failed building wheel for pysha3

Command “/usr/bin/python3 -u -c “import setuptools, tokenize; **file** =’/tmp/pip-build-u73k640u/pysha3/setup.py’;f=getattr(tokenize, ‘open’, open)( **file** );code=f.read().replace(’\r\n’, ‘\n’);f.close();exec(compile(code, **file** , ‘exec’))” install --record /tmp/pip-2j03ad8y-record/install-record.txt --single-version-externally-managed --compile --user --prefix=” failed with error code 1 in /tmp/pip-build-u73k640u/pysha3/

And even I tried another way- to pull cert-issuer from docker given the command  
sudo docker pull cert-issuer,  
It is showing me the error:

getting the error- Error response from daemon: pull access denied for cert-issuer, repository does not exist or may require ‘docker login’.

Please help me out resolving this error.  
Thank you.