I reinstalled Photoshop but nothing has changed.
If someone have a solution, thank you !
PS : I'm on MacOS with Lightroom Classic CC and Photoshop CC (with Adobe Creative Cloud).
What type of image are you trying to Edit? A smart preview or the original? You need to be connected to the original to edit in PS.
Thank you !
It was the problem, actually. I was working with a smart preview and not the original.