I tried to create a new project with Qt creator, but after choosing the type of project, location, component set, a third menu called kits appears with a msg: 'no valid kits found' please how do I get through this?
Please go to Tools->Options->Build & Run->Kits and set up one kit to use. At least fill in the device type, device (most likely desktop) as well as the tool chain and debugger. For qmake-based projects you will also need a qt version and mkspec (which can be empty if you are ok with the default one).
You might need to define Qt versions and tool chains first (other tabs on the same options page).
Creator needs this information to know how to parse your compile output and debug the results.