Server won't add client PC to "Backup status" list after reinstalling client

I have a PC with W10 and a client that showed an update available ( ver. 2.4.11), i applied update and afterwards the server was unable to see the client online, so i uninstalled the client completely, marked client for removal on server (Debian container) and i ran “urbackupsrv remove-unknown” from CLI and reinstalled the client on the PC.

Now the server can see the client online when i point into the right IP, but won’t start backup and switch the client to the “Backup status” list on webGUI, it will stay on the “Client discovery hints” list, i can’t start backup from client side either.