It looks like you are trying to access transmission-daemon (because of the port 9091).
If so, note that by default you can only access the transmission's webui from localhost. In order to enable access remotely, you need to edit the config file located:
then you need enable the white list by changing this field to 'true':
and then either add your client IP, or use wildcards to accept connections from anywhere:
Hope that helps. Let us know how it goes.