stuck at ‘Site Domain to be changed’

I’m attempting to migrate a WP site on different hosting to a subdomain on siteground. This means the domain will change.

When the migrator is running, I get a notification about the site domain changing (which is what we want), and ‘While generating the transfer token, you have chosen to use a different domain than the one currently used with your WordPress. To accommodate this change we will transfer a copy of your current database settings and replace the domain information in the migrated database. Your live website will not be affected.’

I click continue and get a success notification that the transfer has started, then it goes straight back to the same screen. Do I have to press continue for every URL, or is this a glitch?

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