You don't forward a range of ports, but just one single port (50100). That cannot work.
See the FileZilla Passive line: 50100 50100 50100 50100
I cannot see the column headers, but they are probably like
WAN port start |WAN port end | LAN port start | LAN port end.
You must enter the first port (50000) from the range as start port and the last one (50100) as end port. More like 50000 50100 50000 50100.
See the FileZilla Passive line: 50100 50100 50100 50100
I cannot see the column headers, but they are probably like
WAN port start |WAN port end | LAN port start | LAN port end.
You must enter the first port (50000) from the range as start port and the last one (50100) as end port. More like 50000 50100 50000 50100.