solar tftp service don't want to start

!I have installed solar tftp server 10.9.1.33

The solar tftp service is automatic.

When I start the service manually: the service gives the messages it is stopped immediately.

I run windows 10 and antivirus kaspersky.

I am sure I am not running another tftp application because the wireshark on the pc ethernet connected to the tftp client answer on the tftp request from the client: says "icmp unreachable (port unreachable)": so there is not already running a service on port 69.

I have already stopped kaspersky but that didn't help. I have also disabled the firewall.

I have also installed solar tftp server on another windows 10 pc with avast antivirus and here also the same problem with starting tftp service