Migrated Collections to New Site, Outputting "Error 404" Update Menu?

Migrated Collections to New Site, Outputting “Error 404” Update Menu?

Migrated all my collections to another site, products are all listed under set collection, except… When I go to the URL it outputs a 404 error and asks to update menu?

I included collection in online store but still nothing? Not sure if its a domain issue or If I’m missing something?

thats fine, I would like the help. just bare in mind, my store is still far from being finished, I have a mess to fix everything from one store to the other.