Hey, @Pau-l2101. Welcome to the Lightroom Community. The information you've provided is too limited for us to help you.
Please share more details, including screenshots or a video of the issue and the system info from Lightroom Help > System info > Copy and paste into a text document > Upload and attach here. What troubleshooting steps have you tried already?
Thanks! Sameer K
(Type '@' and type my name to mention me when you reply)