The window does not respond - for YesNo dialog box

Two things to try:

1) Check your name mapping and see if there's a duplicate or similar branch to the one that the button is on.  TC could be trying to click on that "other" button and failing.  

2) Use some version of Wait to look for the button before you click.

https://support.smartbear.com/testcomplete/docs/app-objects/common-tasks/waiting-process-or-window-activation.html