Hi Chris ,
Yes i did closed and open QT Creator many times but it still shows the same error. But if i open old qtcreator then i dont see this error…
I have installed the new qtcreator and then i have copied wizard files from old qt to new qt’s wizard directory then i have adjusted mingw and kit. After that it compiles and even debug but qt designer shows this error and the main source cpp file with header file shows green line under the vplayapplication.h file with error “no such file or directory”.