Can't rebuild project

So I have trying to rebuild my project for a plugin but every single time I do so, I get the following error:

I know that the file is locked because of some process but I can’t end those processes. I am really stuck here so if anybody has any idea, please say it.

Restarting did the job. Can you write this as an answer so that I can mark it as the correct answer?

I think this is kind of a windows problem. So u should identify the other process which is using the Build tool (e.g. when you are packaging at the same time?) and kill it. Or try to reboot windows, this should kill all Build process started by UE

Of course, thanks already :slight_smile:

I think this is kind of a windows problem. So u should identify the other process which is using the Build tool (e.g. when you are packaging at the same time?) and kill it. Or try to reboot windows, this should kill all Build process started by UE