Hey Ivan,
Thank you for reaching out to us! I’m very sorry about this issue you are experiencing, let me help you with the troubleshooting.
Could you please go to Events > Settings > APIs tab and under Facebook click “Refresh your connection with Facebook” button to see if it changes anything?
If the issue persists after trying to refresh your connection, I would suggest you to click on “Disconnect” and after that reconnect to Facebook again.
If none of these options helps to solve your problem, please enable WP_DEBUG and WP_DEBUG_LOG and share with us any messages you see while trying to import some events. All WP_DEBUG messages will be stored in a debug.log file in /wp-content/debug.log.
Thanks!
Patricia