Please try to reset the preferences of Lightroom:
Reset Procedure:
- Close Lightroom.
- Hold down [Alt/Opt]+[Shift] while restarting Lightroom.
- Overwrite the Preferences when prompted by the dialog.
- Close Lightroom.
- Restart Lightroom.
If this doesn't help we need more informations:
- Which operating system do you use?
- Which version of Lightroom do you use?
- Has this been worked in the past? If yes, what has been changed on you system before the error occured?
My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 10 Pro 22H2 -- LR-Classic 13.2 - Photoshop 25.6 - Nik Collection 6.9 - PureRAW 4 - Topaz Photo AI 2