SSL Certificate Validation Failed - Windows App

[jhoddino]

I just updated from 1.3 to 2.3.0 today and everything looks good except with the Windows Stirling-PDF app.
In the Connect to Server screen, after I enter my Server URL and hit Continue, I get:

SSL certificate validation failed. The server has an invalid, self-signed, or untrusted certificate.

The cert we use is on our internal Nginx server and not served up on the Stirling server. Could this be what's causing the error?
The web PDF server works fine with no cert error there.

[dosubot[bot]]

This error happens because the Windows Stirling-PDF app does not currently support self-signed or internal CA certificates by default, even if your browser does. Browsers usually trust certificates installed in the Windows trust store, but the app uses its own trust mechanism (based on the Java runtime bundled with the app), so it doesn't automatically trust your internal Nginx certificate—even if you’ve installed it for Windows or your browser "source".

This is a known limitation, and support for self-signed certificates is being added soon. In the meantime, you have a few options:

• Use a certificate from a trusted CA for your Nginx proxy if possible.
• Try importing your internal CA or self-signed certificate into the Java trust store used by the app (this is advanced and not officially documented).
• If your environment allows, connect via HTTP instead of HTTPS for internal use.
• Make sure you’re connecting the Windows app to the backend API URL (not the frontend web interface URL), as using the wrong endpoint can also cause connection errors "source".
• Clearing the app cache or reinstalling the app can help if you’ve recently changed certificates or server settings, but it won’t resolve trust issues.

If you need more technical details on importing certificates or want updates on the self-signed cert support feature, let me know!

To reply, just mention @dosu.

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[Frooodle]

We have a fix coming next release!

[Frooodle]

Can you test if this helps at all?
https://github.com/Stirling-Tools/Stirling-PDF/releases/download/v2.2.1/test-installer.msi

(its a version of 2.4.1 beta stored in old release since github doesnt let me upload here)

[leemac91]

It works! Thank you very much! When will the public version be released?

[jhoddino]

confirmed this version also works for me!

[Frooodle]

We had some users report issues with this still here #5083 (comment)
Once these are addressed, we will release 2-3 hours later.
I have another test version being released in 30 minutes to investigate this further

[leemac91]

Okay thank you. I will wait for the public release then.