Hello!
First off, thank you for your purchase and welcome to our premium plugin support forums! Before posting to the forums, we ask that you review our Testing for conflicts guide. It is a required step to receive support and by doing so prior to creating the thread saves time and helps identify the conflict so we have a better idea on how to resolve it.
Because it was as simple as entering the Facebook event ID into the appropriate field, I went ahead and tested the issue to see if I could reproduce the behavior, but everything appears to be working for me. (see screenshot below)

Please go ahead and review the Testing for conflicts guide and reply back with what you learn. Again, please try getting in the habit of reviewing the guide before opening a new thread. Thanks again and have a wonderful evening. Cheers!