WordPress beginner: SSL error

This is the first time I am doing this and I am completely new to it all, just decided to learn by myself, so I am sorry if the terminology is not right.
There is an existing website with its registered domain.
I just installed WordPress through my domain page (nominalia.com). The hosting was on another page and as I activated the free WordPress account that Nominalia offered, the hosting was moved from that original page to here.
I then wanted to enter as admin to the newly installed WordPress and I keep getting the “There is no SSL certificate configured for this domain.” when I try to open the website.

How do I solve this? I cannot open the page from any device. I tried switching between 2 different networks, also nothing.

Thanks in advance!

 

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