# OPC UA Client configuration error: the certificate and private key do not match

**URL:** https://discourse.nodered.org/t/opc-ua-client-configuration-error-the-certificate-and-private-key-do-not-match/41756
**Category:** General
**Created:** [28 February 2021 12:24 UTC](https://discourse.nodered.org/t/opc-ua-client-configuration-error-the-certificate-and-private-key-do-not-match/41756 "2021-02-28T12:24:28Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![prakashreddy2008](https://avatars.discourse-cdn.com/v4/letter/p/958977/32.png) [@prakashreddy2008](https://discourse.nodered.org/u/prakashreddy2008)
#### Post date: [28 February 2021 12:24 UTC](https://discourse.nodered.org/t/opc-ua-client-configuration-error-the-certificate-and-private-key-do-not-match/41756/1 "2021-02-28T12:24:28Z")

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I am unable to connect to my OPC UA server . Please help .

 ![OPC UA CLient 2021-02-28 at 11.25.34 AM](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/5/95f669177bc1e66e54828018e2e4e759637bb403.jpeg)

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### Author: ![nikhilkinkar](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nikhilkinkar/32/37072_2.png) [@nikhilkinkar](https://discourse.nodered.org/u/nikhilkinkar)
#### Post date: [2 March 2021 12:19 UTC](https://discourse.nodered.org/t/opc-ua-client-configuration-error-the-certificate-and-private-key-do-not-match/41756/2 "2021-03-02T12:19:15Z")

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@prakashreddy2008 I am not sure if this will answer you question, I had a similar issue earlier, have look at this [link](https://github.com/mikakaraila/node-red-contrib-opcua/issues/261#issue-803751660). Hope it may help you.

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### Author: ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)
#### Post date: [1 May 2021 12:19 UTC](https://discourse.nodered.org/t/opc-ua-client-configuration-error-the-certificate-and-private-key-do-not-match/41756/3 "2021-05-01T12:19:33Z")

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