Hi Sebastian!
Thanks for coming back with the Facebook link.
By default, Event Aggregator will look for events that are one month in the future. The events you are trying to import are in March, so you will need to change this setting by going to Events > Settings > Imports tab under Global Import Settings.
Another option is to set a date to refine your import. That way, it will fetch events starting from the refined date.
Please try it our and let me know if that works for you.
Thanks,
Victor