'QObject' file not found

[MyNameIsQt]

My hard disk broke, so I installed qt creator on a new hard disk. I copied the project folder under development here and opened the project. But why do I get the following error?
I installed all the libraries that were installed from the qt creator I used before.

[J.Hilk]

@MyNameIsQt

1. close the project
2. delete the *.user file of your project
3. open the project anew in qtcreator
4. follow the project setup wizard
5. if still errors, try compiling despite errors, this is an IDE code parsing problem.
6. if still persistent show us your projects tab and/or the kit section of QtCreator

[MyNameIsQt]

@J-Hilk
Thanks.

[MyNameIsQt]

@MyNameIsQt

[Pl45m4]

@MyNameIsQt

What is this symbol/char, where you would expect a slash ( /) as path separator?
Did you copy your settings from the broken drive?

Edit:

It's the ₩ Won currency symbol, right?!
I don't think this should be in your Qt Kit path...

[cristian-adam]

Windows is using \ as ₩ when using some Korean code page. And this is normal, unless ₩ is used as the Unicode symbol and not \.

Qt Creator should display \ correctly since is a Unicode application.

What happens if you build a new Qt Widgets application? Does it compile?