# Configuration error the certificate and the private key do not match

**URL:** <https://discourse.nodered.org/t/configuration-error-the-certificate-and-the-private-key-do-not-match/40943>\
**Category:** General\
**Created:** [13 February 2021 20:39 UTC](https://discourse.nodered.org/t/configuration-error-the-certificate-and-the-private-key-do-not-match/40943 "2021-02-13T20:39:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jamil100](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/jamil100/32/35986_2.png) [@Jamil100](https://discourse.nodered.org/u/Jamil100)\
**Post date:** [13 February 2021 20:39 UTC](https://discourse.nodered.org/t/configuration-error-the-certificate-and-the-private-key-do-not-match/40943/1 "2021-02-13T20:39:43Z")

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Hello, I am trying to connect to an OPC UA Client. I have put the endpoint URL but I am getting this error. Does anyone know how to solve this?

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/9/2994c770b71b3f01e37cc324dd2313708919aa4e.png)

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**Author:** ![psalibe](https://avatars.discourse-cdn.com/v4/letter/p/e9c0ed/32.png) [@psalibe](https://discourse.nodered.org/u/psalibe)\
**Post date:** [17 March 2021 15:18 UTC](https://discourse.nodered.org/t/configuration-error-the-certificate-and-the-private-key-do-not-match/40943/2 "2021-03-17T15:18:24Z")

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I am getting the same thing. I have been using these OPCUA nodes for months and never had this happen and now its happening. I deleted the folder suggested [here](https://github.com/node-opcua/node-opcua/issues/930) but it comes right back.

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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:** [16 May 2021 15:19 UTC](https://discourse.nodered.org/t/configuration-error-the-certificate-and-the-private-key-do-not-match/40943/3 "2021-05-16T15:19:07Z")

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