Hello @Zonal, welcome to the forum!
Can you clarify what you mean by “can’t make it connect”? Do you mean you can’t get to the web based UI, can’t get Duplicati to see the paths you want to become a up, can’t get the job to connect to the backend, or something else?
Did you follow I this guides for your setup? If so, if like to figure out where it didn’t work for you.