If Report Tool for Amazon seems to be "stuck" shortly after starting the Word generation (after the progress entry that it loaded a Word template), most likely there is a concealed message box waiting for your input - press "Alt + Tab" to cycle through windows.
Please note:
You can test Word generation without the time-consuming effort of generating a full report as per How to test Word generation as shown below. The below screenshots show a blocking dialog that waits for user input and the workaround to disable this dialog in Word > Options > Trust Center > Privacy Options.
Solution: Update the Word Template to disable the dialog in Word > Options > Trust Center > Privacy Options: