Hey Emily,
Thanks for reaching out and so sorry about the trouble here with creating recurring events!
I was looking at your System Information (thanks for providing that!) and it looks like you are running The Events Calendar 4.4.0.1 with Events Calendar PRO 4.4.1. Will you please try updating The Events Calendar to 4.4.1 to see if that fixes the issue?
The reason I want to start there is because those two plugins rely on one another and keeping them synced to the same versions often ensures that the functionality of both are in tact.
Hopefully that does the trick but, if not, will you please let mw know and provide me with your updated System Information in a private reply?
Thanks so much!
Geoff