Can`t connect to my Qnap NAS within Qubes OS 4.1.0

I am using a Qnap NAS TS-231P for my Qubes OS backup. With Qubes OS 4.0.4 it was easy to connect to the NAS with the file manager. In the menu of “Other Locations” at the bottom I had to fill in the IP-adress of the NAS. Left of it there was written" Connect to server". Please see also the attached screenshot. Then I just had to click on “Connect” and after that I had to fill in the login credentials of my NAS. However with Qubes OS 4.1.0 after I typed in my IP-adress of the NAS it is not possible to click on “Connect”. This is the case with Debian 11 and Fedora 34. Please help me how to backup Qubes OS 4.1.0 with my NAS.
Thank you.
Stay healthy $ safe.
Best Knut von Walter

Samba service enabled on the QNAP ??

Command on the Qube should be smb://

Thank you very much! Your post solved the problem.