Image thumbnails blank after clone

[Bobby Ewing]

Server operating system version

Ubuntu 22.04

Plesk version and microupdate number

18.0.60

Hello! After cloning my Wordpress site in plesk with wp-toolkit, image thumbnails do not show in media library. The images exist, I can copy the link and full image shows, but thumbnails do not show? Anybody that know why and how to fix it?