WP-Admin Blank on Forward

DelkaNenkova,

You need to make correct WordPress transfer to new domain

https://codex.www.ads-software.com/Moving_WordPress
https://www.wpexplorer.com/migrating-wordpress-website/

Maybe I did not explain it very clearly or I am not understanding. I am not moving the files, the files are in https://mermaid.wavefactory.org/ and will be there.

I simply masked and forwarded the site on the new .com URL. The problem, as you know, is that although users see https://www.mermaid-entertainment.com if they share a page or if they open it on a new tab the “real link” will appear: mermaid.wavefactory.org/…

So, In the WordPress CPanel I changed the “Site Adress (URL)” to the new .com and now each page is at .com/… but the control panel is not working.

You changed website url and need update all links in database now, because they point to old domain.

Would you recommend this procedure?
Online WordPress Serialized PHP Search and Replace

DelkaNenkova,

Yes https://pixelentity.com/wordpress-search-replace-domain/

Where do I get the SQL file?

You need make database backup via phpmyadmin

I use Godaddy, I can do it throu their site, right?

So, after the backup I will get the SQL file, is that it?

Thank you very much for your time and patiente.

Yes, you need to learn Godaddy documentation and contact their customer support. This is Fruitful theme support only. Your questions related to hosting.