Welcome to the forum.
Do you mean: right click into the Project Bin → Add Title Clip is greyed out?
If yes, try with the standalone version from the download page.
I know it has been a while. “Create title clip” was greyed out for me as well. I saved the project, closed it, and then re-opened it, and then I could add a title clip. I didn’t have to change version or run it in Admin mode. FWIW, I’m using the Kedenlive 24.08.3 Flatpak version in Fedora Kinoite 40.