Try to import again. If that doesn't do anything, go through these steps:
1: Check to make sure you used the correct Session_ID. You can find it within this tutorial: https://kemono.party/importer/tutorial
2: Make sure you are logged into your paywall
3: Log out and back into the paywall, then use the new Session_ID
4: If an Internal error occurs, please retry your import
5: If you get an “Error while trying to import (insert post here)”, please contact Kemono staff for assistance.
6: You are not subscribed to anyone. Please subscribe to someone and try again. Make sure your subscription is active at the time of import.
7: See if the creator has been imported regardless of log status
8: Posts may have been imported, just not indexed. Just be patient. They are on the site, just not being displayed properly yet.