Flameshot does not work at Fedora Workstation 39

For Fedora Workstation 39, installed through VirtualBox, was installed Flameshot with the sudo dnf install flameshot command. Even when the OS was re-started, when through _Show Apps_ for the Flameshot icon: 1. is accomplished double left click nothing happens 2. With right click appears the contextual menu and doing click at the _Open launcher_ item, after of some seconds, appears at the top of the screen, just below of the clock, a small Window with the _Flameshot Error - Unable to capture screen_ message and below other Window with some settings and including the _Take new screenshot_ button. If the mentioned button is clicked this (2) case happens again. If with the Right Click for the mentioned contextual menu: * is selected the Configure item then is opened the expected window * Is selected the Take screenshot item happens the point 2 but without the second window What is missing? Some extra configuration? Some extra package to install? or is it a bug?