Cannot launch Unreal editor after runtime crash

I am running UE4 (4.23) in Linux, using QT Creator. Whenever I play in editor and I run into a runtime error, I get the error window (attached) and I cannot restart the editor without getting this same window. It doesn’t matter if I recompile the project.

Is this due to QT Creator’s files not working (thus not recompiling the project?), or is there some cached data owned by the editor that I have to manually clear?

Thanks in advance.