Issue with multisite - new site created cannot be accessed

Hello guys!

I am having an issue creating a multi site. I have followed all possible articles out there, but there is something I am missing.
After creating my new site, the ''DASHBOARD LINK'' goes nowhere. Simply blank page. Same if I try to view site.

I have followed this https://premium.wpmudev.org/blog/ultimate-guide-multisite/ and also some others out there. I reach to that part of ''Creating a Site''. From here I am stuck.
My site is littlerenard.com and subdomain created and new site should be at test.littlerenard.com.

I also have to say that the folder where the new site is created, seems empty.

Could you please help me?