maping no works with https and appear 404 error

hi, I have a problem i have mapped
https://ameliesurco.pe <==> https://betania.com.pe/proyecto/amelie-surco/

but appear an error security with https and redirect to 404 page.
My additional domain is pointing to the root installation of the main domain and A records to the same IP

when i go to: https://ameliesurco.pe, redirects to: http://prntscr.com/oyd6l6

error 404: http://prntscr.com/oyd6yx
configuration mappings: http://prntscr.com/oyd79t
configuration settings: http://prntscr.com/oyd7jg

The web is hosted on bluehost. I have the last version of the plugin and last version of wordpress.

What should I do? thanks in advance

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