my premium presers are gone

Unfortunately you haven't given us any information about your system. Therefore, all proposed solutions are a look into the crystal ball

• What has been changed on your system or what you has been done before the error occur?
• Please describe the steps you’re doing, so we can try to reproduce.
• Do you get an error message? If yes, please post the message word-by-word.
• Which steps do you’ve try to solve the issue

Please provide a copy of your 'System Info'. This can be get from the Lightroom menu item Help > System Info. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.