Can't link parked domain :O

So… I added a new version of another project and trying to link a domain I own. The message I keep getting is "An internal error occurred. Our developers have already been notified.
" but it says it’s “Ready”… however… the domain has pointed nameservers and well… I don’t undertand.

Website: https://lionstudios.000webhostapp.com/
Domain: www.lionstudios.se (lionstudios.se)

How can I resolve this?

Hello. Do you remember linking the provided domain in an Account other than the one you’re using now?