Problem with selecting network storage (samba) for backup location

Hi, since 3 days i have a problem with creating new vaults or new backup plans. When i try to make new vault on a network samba storage nothings happen. I see the network storage, can select the folder, but the OK button (for finishing the operation of choosing location) remains inactive. When i press the green arrow on the right where the folder path is described the OK button becomes active but when i press it i get the popup Checking Vaults for 1 second and then disappears and nothing happens. I can't make new backup - the things there are the same. When trying to choose location for the backup i can't go out from the windows for selecting the folder for the location. Same thing - the popup window "Operation progress - checking vaults"shows for a second and disappears. 3 days ago everything worked fine.
Have search in the forum but couldn't find solution. Tried to reinstall Acronis but the problem persist.

Can you please help me with this issue.
Thank you.