first of all, don't reboot because your setting.json file is not on an external disk and is not saved in flash as far as i can see. (check forum on how to save to flash)

Second. You should be able to connect with this:

http://192.168.1.1:8008

Since transmission has is own build in webinterface i would leave the port on default (9091) and connect like this:

http:192.168.1.1:9091

If that works, you should also be able to connect with transmission remote dotnet