If you are migrating from a Wix blog to Hubspot, I advise you to export the blog and re-import it into Hubspot rather than using the smart copy, which may cause some elements to be buggy / skipped during the migration.
By doing an export / import via a csv file, you will be able to correctly re-import all your articles and all the elements that compose them into your new blog by mapping the fields, such as a contact import (title tag, description meta tag, url, h1, body, author, publication date etc.)
I tried to migrate my blog from Wix using smart copy but it shows as invalid URL.
Hey @masahirokjp , I already migrated the wix site of one of our clients via an export of their blog on hubspot CMS, so it seems to me that it is possible 🙂 Maybe you should contact Wix support to ask them for a CSV export if you can't do it from the platform?