Hi @dazzledev
Welcome to the MainWP community.
Is the basic auth set up on that child site in the same way as on the other child sites?
Can you temporarily try removing basic auth and see if you are able to add the child site then?
Hi @dazzledev
Welcome to the MainWP community.
Is the basic auth set up on that child site in the same way as on the other child sites?
Can you temporarily try removing basic auth and see if you are able to add the child site then?