Are you running TMSHttpConfig utility with administrator privileges?
I have a similar error.
I start TMSHTTPconfig with admin rights, choose SSL - Add
and "Select Certificate"
I take my own certificate made with TMS X509v3 Certificate Generator
By clicking "OK" an error appears:
HTTP Server API Error.
Eine angegebene Anmeldesitzung ist nicht vorhanden. Sie
wurde gegebenenfalls bereits beendet.
I don't know the error message in english
Thomas, your problem it's a different one, that's an invalid certificate.
Is there any help on how to generate a certificate? What can I do wrong? It's only for test on my local computer.
Without a real domain, you will only get "fake" certificates (self-signed), so I'm not sure exactly what you would like to test?
Is not it true that we need a certificate to test https? (Google translator)
We want to test server and client modules on different devices. We have firmly defined https in our modules. On our Cloudserver, we have Let's Encrypt installed and it works fine.
Can we test on local computer without certificate? I thought, no.
It's true, but what exactly you want to test? In Sparkle, for example, HTTPS connection is transparent. If it works fine in your server with Let's Encrypt, then isn't it tested and confirmed to work?
Of course. But we are at the beginning of our development and want to test in the short way on the local development computer. At the first time, we took http, but we want to get used to using only https. (e.g. on apple http doesn't work without changing system settings).
I'm not sure what do you mean by TMX X509v3 Certificate Generator?
There seems to be indeed an issue with the specific Certificate Generator tool in the web site. One thing you can do is install TMS Cryptography Pack, there you have a similar tool, but it's updated and the issue is not present. Or you can use any other tool that generates certificates, of course.
Thank you. I will try to use the Crypto Pack.