Lan access for web gui


I am new to here, so please forgave me if i aint good in knowledge about this product,
However, i plan to use this to backup my ProxMox host for my personal use and it seem to start the program, but with the issue i cant access it due to its listen for - but my host isnt the same -hmpf, do you see any chance how i can solve this? or do i only see it on a wrong site and can use the stuff on my client to backup the remote one?

See some tips about web-ui here: :d: Duplicacy-Web ad-hoc FAQ