can you make sure DSS is actually running in your vm? You'll need to SSH into the box, become the user you used to install DSS and move into the bin folder contained inside your data_dir (the folder you installed DSS into).
There is a command in that folder called dss, you can use it with ./dss status to understand if DSS is running. If not, you can start it with ./dss start
Once done, you'll need to point your browser to the port you decided to install DSS. If you don't remember which port it is, read the install.ini file contained into the data_dir, it will contain the port DSS is exposed to.
When working on cloud, however, you'll need to make sure you can reach the vm where DSS runs. This involves setting rules on security groups, having public IPs, etc. Those activity are beyond our support
If DSS doesn't start for any reason, attach the backend.log to this post. You can find it into data_dir/run/backend.log