# Trouble cert-web-component

**URL:** <https://community.blockcerts.org/t/trouble-cert-web-component/991>\
**Category:** Technical\
**Created:** [April 24, 2018, 2:20am UTC](https://community.blockcerts.org/t/trouble-cert-web-component/991 "2018-04-24T02:20:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mirajking](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mirajking](https://community.blockcerts.org/u/mirajking)\
**Post date:** [April 24, 2018, 2:20am UTC](https://community.blockcerts.org/t/trouble-cert-web-component/991/1 "2018-04-24T02:20:04Z")

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Hi, I am having issues getting the cert-web-component to run locally. I followed [this](https://github.com/blockchain-certificates/cert-web-component) guide in [Read.ME](http://Read.ME). I ran polymer serve and the app displayed but was blank. Stating “no documentation was found”.

Do I just make necessary changes to index.html? I am using `sample_signed_cert-valid-1.2.0.json` as my sample hosted certificate.