if you have installed the sim and depending on the provider you may have to add the APN for the SIM
by default the remote manager is not enabled to collect to the cloud.
if you are on about access to the router remotely this would depend if the router is given a public address
this could be found by checking what address is given.
as nick said from the router you should check if it has connectivity by pinging an address on the internet
from execute command
check DNS is working
make sure you can ping remotemanager server