Solved! Might be It happened to use external monitor.
To solve the issue you have to do a premiere pro moved on the main screen and close the app. Then click the app icon again to open. and at the same time hold down Shift-Alt (Windows) or Shift-Option (Mac OS) while the application is starting. Release the Shift-Alt keys or Shift-Option key when the splash screen appears. Hope it will work. Thanks
Solved! Might be It happened to use external monitor.
To solve the issue you have to do a premiere pro moved on the main screen and close the app. Then click the app icon again to open. and at the same time hold down Shift-Alt (Windows) or Shift-Option (Mac OS) while the application is starting. Release the Shift-Alt keys or Shift-Option key when the splash screen appears. Hope it will work. Thanks