Widget bp or C++ Player Controller causes packaging error

Playing in the editor and playing in debug worked well as I intended.
But when I try to packaging the game, it fails.

Deleting the Pause Widget, packaging the game does not fail.
So I tried to delete and create a new blank Pause Widget with same name, but the result is same.

Should I not handle pause widget bp in c++ player controller with BindAction?

[source code (C++)][3]

Finally, I solved this problem.
However, this was not a problem with my source code or configuration.
Replacing the reference to pause widget, It worked normally after deletion.

Adding a new asset, sometimes there was a bug that it could not be edited.
This seems to be caused by a bug which caused when I add new asset.