Message erreur à l'importation de photos

Looking at your folders panel, all those ? marks. They indicate missing folders, often caused by moving/renaming folders outside of LrC, or due to being on a external hard drive not connected, or far worse on a Network share.   (the later two, not indicative from what is presented)

This needs to be addressed. You need to update those folder locations.

The more of a mess your folders get, the more likely you will get such errors. and eventually, catalog corruption.

see:

https://www.computer-darkroom.com/lr2_find_folder/find-folder.htm

https://helpx.adobe.com/lightroom-classic/help/create-folders.html

that one in French (I hope)

https://helpx.adobe.com/fr/lightroom-classic/help/create-catalogs.html

Welcome to the Lightroom Classic community. I'll need more info to help you figure this out.

Where are the images stored & where are you importing them to? Could you please share a screenshot of the import settings you are using? What specific version of macOS are you working on?

Try the import operation with the following suggestions:

• If you're importing from an external source, copy images on the internal drive manually using the Finder first & then try to import.
• Ensure Lightroom Classic & Photoshop have the required permissions on macOS: https://community.adobe.com/t5/lightroom-classic-discussions/quick-tips-how-to-give-full-disk-access-to-lightroom-classic-on-macos/td-p/12913413

Let me know how it goes,

Thanks!

Sameer K