Good evening Gustavo and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about the Facebook event images not importing properly.
I would love to help you with this topic.
As it turns out, we are very close to releasing a fix for this issue.
We apologize for the inconvenience this has created.
But, the good news is that there is a manual workaround that you can apply today.
The issue is actually not related to PRO itself but to previously imported images.
1. Have TEC and/or PRO active.
2. Delete media uploads (Media > Bulk select > Delete Selected) for the Facebook events related images.
3. Import an event from Facebook using EA.
4. View imported event (featured image should have been imported).
Let me know if that helps.
Have a great day!
Geoff B.