Hi everyone,

I’m trying to launch 3DEXPERIENCE, but the Launcher diagnostic keeps showing:

[✘] Failed to connect to the Launcher (HttpSendRequest 12037)

I initially thought it was a blocked port, but after checking in PowerShell, the local port is reachable and the issue seems to be the HTTPS certificate.

What I found:

dslauncher.3ds.com resolves correctly to localhost:

::1
127.0.0.1

The launcher is listening/bound on port 20300.

When I open this in the browser:

https://dslauncher.3ds.com:20300/

I get:

NET::ERR_CERT_DATE_INVALID

netsh http show sslcert shows:

IP:port          : 0.0.0.0:20300
Certificate Hash : 849cab864f1b393dacf6090b2cfc4f74d8b5f176

The certificate details are:

Subject    : CN=dslauncher.3ds.com
Thumbprint : 849CAB864F1B393DACF6090B2CFC4F74D8B5F176
NotAfter   : 4/4/2026 1:59:59 AM

I already tried:

• Fully uninstalling and reinstalling the 3DEXPERIENCE Launcher
• Deleting the old SSL binding with netsh http delete sslcert
• Removing the expired certificate from Cert:\\LocalMachine\\My
• Rebooting
• Reinstalling from the 3DEXPERIENCE platform
• Adding inbound/outbound firewall rules for the launcher ports

After reinstalling, the launcher recreated the same certificate hash again, and the same NET::ERR_CERT_DATE_INVALID / HttpSendRequest 12037 error remains.

Has anyone else seen this issue with the 3DEXPERIENCE Launcher / Makers platform? Is there an updated launcher installer or certificate fix available?

Thanks!