Download error :

[Vaibhav Golam]

error image :

so basically i wanted to create multimedia app for pc but when ever i write this line :

QT += core gui multimedia
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

it give me error this error :

Cannot download archive http://download.qt.io/online/qtsdkrepository/windows_x86/desktop/qt6_dev_src_doc_examples/qt.qt6.dev.doc/6.7.0-0-202310031040qdoc-documentation.zip: Connection closed

Thing i did before posting question here:

1. builld
2. clean
3. rebuild

I think my files are missing or packge is missing so i am trying to install from maintainance.exe but when ever i select QT multimedia it doesnt download

please help
thank you!