I created a new Issue type schemes and want to associate it to the my Project. The Project is a new one and it's a Software Project.
I tried to go to Project Settings and add issue type, but i can't choose the Issue type schemes I created. Only choose a default one or create a new one.

The other way round doesn't work either. If I try to go to Jira Settings / Issues / Issue type scheme and choose my created Issue Type scheeme and want to associate it with a project, my project doesn't appear in the project list:
What do I have to do?
Thank your for your help