Cant run test code after finish install.

[anycode3]

1.I clone this code from github ;
2.Use this CMD install this library
()
3.use command
qmake
mingw32-make
mingw32-make install
to finish the install
4.add QT += xlsx in my .pro file
5.run the test code

6.Cant run and the error info like this:

So how can I solve this problem ,Thanks a lot !

[VSRonin]

usually when you change your .pro file you have to re-run qmake, did you do that step?