# Kibana plugin certificate error
**URL:** https://discuss.elastic.co/t/kibana-plugin-certificate-error/288281
**Category:** Kibana
**Tags:** kibana-plugin-development
**Created:** [November 3, 2021, 5:02am UTC](https://discuss.elastic.co/t/kibana-plugin-certificate-error/288281 "2021-11-03T05:02:34Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@111505](https://discuss.elastic.co/u/111505)
#### Post date: [November 3, 2021, 5:02am UTC](https://discuss.elastic.co/t/kibana-plugin-certificate-error/288281/1 "2021-11-03T05:02:34Z")
Hi 🙂
I need Kibana css plugin.
So I wrote the command below.
`./kibana-plugin install file:///usr/local/ELK_7.9.2/kibana-7.9.2-linux-x86_64/kibana-dashboard-custom-css-master.zip`
However, I get an authentication error as below.
```auto
Picked up proxy http://[MY PROXY IP] from environment variable.
Error: Client request error: unable to verify the first certificate
Plugin installation was unsuccessful due to error "Client request error: unable to verify the first certificate"
```
Http has no problem with the proxy, why am I getting a proxy error? Does Kibana-plugin use a different communication method?
---
### Author:  [@Mikhail\_Shustov](https://discuss.elastic.co/u/Mikhail_Shustov)
#### Post date: [November 4, 2021, 3:33pm UTC](https://discuss.elastic.co/t/kibana-plugin-certificate-error/288281/2 "2021-11-04T15:33:58Z")
> [@111505](#):
>
> Picked up proxy http://[MY PROXY IP] from environment variable.
It means the certificate chain is incomplete. Are you sure Kibana doesn't try to use `https` protocol?
Do you have `NODE_EXTRA_CA_CERTS` env variable set?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 2, 2021, 3:34pm UTC](https://discuss.elastic.co/t/kibana-plugin-certificate-error/288281/3 "2021-12-02T15:34:32Z")
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