# Can't connect using Design Launcher...Certificate trust error

**URL:** <https://forum.inductiveautomation.com/t/cant-connect-using-design-launcher-certificate-trust-error/112510>\
**Category:** Ignition\
**Created:** [November 30, 2025, 1:20pm UTC](https://forum.inductiveautomation.com/t/cant-connect-using-design-launcher-certificate-trust-error/112510 "2025-11-30T13:20:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![john\_doe1](https://avatars.discourse-cdn.com/v4/letter/j/b782af/32.png) [@john\_doe1](https://forum.inductiveautomation.com/u/john_doe1)\
**Post date:** [November 30, 2025, 1:20pm UTC](https://forum.inductiveautomation.com/t/cant-connect-using-design-launcher-certificate-trust-error/112510/1 "2025-11-30T13:20:11Z")

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Hello,

Have been using Ignition on this PC for over a year. This morning, I attempted to connect using Design Launcher and received the error that there was no trusted certificate. I used the TRUST button to trust the certificate (there is one listed under DETAILS that has my name/organization on it) but I still get the COnnect Error…SSL Certificate is required for gateway but was not trusted. Javax.net.ssl.SSLHandshakeException. No name matching localhost found

I do not believe that there were any updates performed since I’ve had it disconnected from the internet for a few weeks. I did upgrade a few user permission levels in Windows (not Ignition), but that should not have done anything.

Please help.

Thanks,

Brian

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**Author:** ![bschroeder](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bschroeder/32/13260_2.png) [@bschroeder](https://forum.inductiveautomation.com/u/bschroeder)\
**Post date:** [November 30, 2025, 1:42pm UTC](https://forum.inductiveautomation.com/t/cant-connect-using-design-launcher-certificate-trust-error/112510/2 "2025-11-30T13:42:13Z")

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Version?

Are you using the jnlp web launch? If so use the client launcher instead and see if that works.

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**Author:** ![john\_doe1](https://avatars.discourse-cdn.com/v4/letter/j/b782af/32.png) [@john\_doe1](https://forum.inductiveautomation.com/u/john_doe1)\
**Post date:** [November 30, 2025, 4:09pm UTC](https://forum.inductiveautomation.com/t/cant-connect-using-design-launcher-certificate-trust-error/112510/3 "2025-11-30T16:09:59Z")

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Good Morning!

I am using the app DESIGNLAUNCHER.EXE. I’m just dumbfounded that it stopped working. Obviously a security thing…and it says as much…but the TRUST option doesn’t fix the problem.

The launcher is the one that downloads from the local host logon page, upper right corner (localhost:8088)

Thanks!

Brian

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<div class="post-metadata">

**Author:** ![john\_doe1](https://avatars.discourse-cdn.com/v4/letter/j/b782af/32.png) [@john\_doe1](https://forum.inductiveautomation.com/u/john_doe1)\
**Post date:** [November 30, 2025, 4:13pm UTC](https://forum.inductiveautomation.com/t/cant-connect-using-design-launcher-certificate-trust-error/112510/4 "2025-11-30T16:13:10Z")

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Sorry…version 8.1.43