FFS NOT working on Ubuntu 26.04

[vincbozzi@gmail.com]

Hi all! I upgraded Ubuntu from 22.04 LTS to 26.04 LTS and I tried to sync my user folder as I'm used to do.
Now an issue FFS talks about a failed folder creation

errore ffs.png

but that one already exists

exixting folders in USB disk Backup.png

.
Maybe a permission problem or a mismatch in naming folder? Before upgrading to 26.04 the path in FFS GUI was "media/v-v/Backup/Backup Ubuntu FFS/ ..." now is "/run/media/v-v/Backup/Backup Ubuntu FFS/ ... .
Thanks in advance for your help

source target dir.png

[vincbozzi@gmail.com]

UPDATE:
Today I changed folder name on right syncing side, all right for first run (full copy) but KO for following run, same issue ...