Website is broken

I am still having trouble with my website. It has had the white screen of death for some time. So I fixed the ninja forms problem, and reuploaded the new version via FTP. And it made my website go online, but there was no homepage and there was no theme or structure. Everything was out of order. So I tried disabling all the ninja forms plugins as well as updated my theme Jupiter to its newest versions through FTP.

And still everything is out of order. I can’t login to my admin. when I type my domain/admin in the web address, it automatically populates to domain.com/home/wp-login. It lets me add my username and password but doesn’t take me to dashboard, just the broken page that has a 404 error in the middle, but shows my footer and logo on random spots of the page. You can access my pages through the footer, but there is no proper layout and it looks horrible.

I remember once I completed my website (before the error occured), I updated the ninja forms plugin and I noticed that the home page had no content. So I was trying to figure out how to get the landing page to be the page I wanted. I was in the settings part of dashboard, and I may have changed things that weren’t supposed to be changed. So maybe that is why things aren’t working.

Any suggestions?