When having used Transporter import and the results are displayed, the only way to continue is the edit the url in addressbar of the browser.
It's more user friendly when a button is added in the result page which redirects to i.e. Dashboard.
Version Beta v5.0
Pi-hole version is v4.3.2-391-ge0b3405 (Latest: v4.3.2)
AdminLTE version is v4.3.2-360-g88da85f (Latest: v4.3.2)
FTL version is vDev-a90f14b (Latest: v4.3.1)
On my browser, the teleporter import opens in a new tab, and the original dashboard tab remains open. When the import is complete, I close the new tab.
Perhaps that is a browser setting on my specific browser.