QML module not found (QtQuick.Controls)

[Bracha]

Hi.
So far I have been using the Open Source version.
Now I updated to the version with the license I purchased - I downloaded an online installer according to the instructions, and installed version 5.15.11 like my colleague has.
And now when I open the project again I get the message in the header.
(after in our code we imported into this library)
What could be the problem and how to solve it? I would appreciate help from the experienced here.

[SGaist]

Hi,

Please don't post the exact same question in multiple sub-forum. One is enough. When needed, it can be moved.

Closing this one as duplicate from this thread since it's in the correct sub-forum.