Problem to run muli wordpress’s on my domain

Hey,

I tried to make a webpage where people could choose their language.
my main domain is .

https://www.mikaandfabiola.com / it is the domain where they choose language

https://www.mikaandfabiola.com/da
https://www.mikaandfabiola.com/en
https://www.mikaandfabiola.com/es
// is the 3 different sub-directories i made to contain, each a wordpress upload .
So when i loaded the wordpress files on https://www.mikaandfabiola.com , i got to the menu where i could set up the webpages admin info.
But when i installed https://www.mikaandfabiola.com/da/ and wanted to start up the page it redirected it to the login for https://www.mikaandfabiola.com and the https://www.mikaandfabiola.com/da/ was just blank???
anybody know what this probles is?

It have been running perfect until now, so im kind of comfused.

Thanks for your help.

Mika