# Bad certificate untrusted

**URL:** <https://discourse.nodered.org/t/bad-certificate-untrusted/47818>\
**Category:** General\
**Created:** [30 June 2021 02:29 UTC](https://discourse.nodered.org/t/bad-certificate-untrusted/47818 "2021-06-30T02:29:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jerrold](https://avatars.discourse-cdn.com/v4/letter/j/49beb7/32.png) [@Jerrold](https://discourse.nodered.org/u/Jerrold)\
**Post date:** [30 June 2021 02:29 UTC](https://discourse.nodered.org/t/bad-certificate-untrusted/47818/1 "2021-06-30T02:29:28Z")

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![help](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/f/8f3d8c963a45fe436b88c4f31ffb42d55ec31691.png)  
 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/f/ffb526f66cae6bb285b5c2f1a54b2fe4984ee8b9.png)  
hi I'm new to node red and i have been trying to use the opcua client in node red to connect to a plc opcua server. i have been receiving this error message, i have also tried reinstalling node red to no avail. i would like to know how to fix this error. thanks.

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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:** [29 August 2021 02:30 UTC](https://discourse.nodered.org/t/bad-certificate-untrusted/47818/2 "2021-08-29T02:30:22Z")

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