Page cannot be displayed

We recently migrated from SDP on prem to SDP OnDemand. It trying to receive purchased items, I noticed there are several components/assets missing. I tried to access the on prem version but was receiving an SSL issue which prevented the login page from being displayed. I ran the batch file to change the webserver port to 80 using HTTP protocol. I now get a page can't be displayed error.

I have tried to start the Postgres service but get

PS D:\ManageEngine\ServiceDesk\bin> .\startDB.bat

server starting

PS D:\ManageEngine\ServiceDesk\bin> option requires an argument -- p

Try "postgres --help" for more information.

I have tried startSDP.bat but it hangs on the Application layer started.

How do I access the on premise version?