QT += multimedia under windows, broken project

[Xena_o]

Hello,

Im facing a weird issue, i actualy added to an existing project under Qt 5.15.2 under Windows :

QT += multimedia multimediawidgets

i get the error

Unknown module(s) in QT: multimedia multimediawidgets

the weird part is when i try the "player" project example from Qt who uses multimedia, it works fine, also if i create a new project and add multimedia, all is fine.

Also if i copy the project to MacOSx under same version of Qt 5.15.2, i add multimedia, all goes fine, i just have the issue under windows...

Just to one project i get this error, i guess the project is broken or something ?
Anyway to get it work ?

thank you

[jsulm]

@Xena_o Did you make sure you're using Qt 5.15.2 which has QtMultimedia module? Check the used Kit.
You can also try a complete rebuild: delete build folder and run qmake.

[Xena_o]

@jsulm yes its is the 5.15.2 kit, i checked. I deleted the build folder, and built again, this did not solved the problem.

[Xena_o]

i figure out the issue : for some unknown reasons Qt created extra .pro files, i found .pro.user and two .pro.user.xxxx where xxxx is random hexa
when i deleted those files, Qt recognized multimedia immediatly !