if netcut_windows.exe is running , and from the web interface you see “netCut is running under Admin”. it is fine.
for connection part. when you connect to WIFI , you should have a WIFI Access point name to connect to. check the one you connect via PC , and check the one your phone connect to. make sure they are the same.
if you can login into WIFI router , check or disable one SSID that you don’t want to use. so only one SSIF working .