Joshua,
Try installing and activating WP Crontrol. I’d also try deleting the license keys from your site. Then, deactivate and delete both The Events Calendar and Events Calendar PRO and reinstall them. Check out the WP Crontrol options to see if you can stop and/or remove the hung out import. Lastly, reinsert your license key and see if the stuck import message still appears.
The good news is, the next upcoming maintenance release should include a fix for the users experiencing this known issue. Please stay tuned to our Release Notes and the plugin changelogs for more information. Thanks again and let me know if you’ve got any additional questions or comments. Cheers!