Qt 6.11 is out! See what's new in the release
blog
No SDK's were found that contain Qt support
-
What versions of Qt did you install? Are you developing for Symbian? What devices? Qt 5 and Qt 6 don't support Symbian, you'll have to use a 10+ year-old Qt4 version for any possibility of getting it to work.
-
You could try in here:
https://download.qt.io/archive/qt/You will, I assume, have to compile from source to target Symbian.
