Command line execution from the correct directory.
This worked in 1.6.6 in both Live and Testlive branches. This does not work in 1.6.9 for Testlive. And, 1.6.6 does not seem to run the new Age of War update.
I don’t know if that’s the specific issue you are seing, but recently the name of server executable changed from ConanSandboxServer-Win64-Test.exe to ConanSandboxServer-Win64-Shipping.exe, which made the Dedicated Server Launcher to not detect the installed game anymore.
I fixed that in 1.7.0, but there are other changes that may cause issues, will know more when I get feedback on that version.