New tld causing error?

I have a completely fresh install on a self-hosted site. Immediately upon install (and re-install) WP returns a 403 error when I attempt to go through the toolbar to customize. In other words, logged in on the site, on the landing page, toolbar/customize will return a 403 error. At the same time, going into the dashboard/appearances/customize will open the customize screen as expected. This appears to have something to do with the tld .international as all other sites, same install, same host, etc have no issues. Changing the URL from www or not does not matter. Table in myphpadmin has correct URL. Any other ideas?

I have not yet used the site to see if any other problems occur because I don’t want to put time into it if the site is not stable. Has anyone seen this and think it is or is not the domain name?