Hey @Sebastiaan,
Sorry you’re having some trouble here. From the sound of your ticket, it may be because of what you wrote in your second sentence: “I’m trying to create a monthly recurring event.”
If you are literally using the “Monthly” recurrence type option, then this will not work.
But it should work fine if you use the “Custom” recurrence type – I just tested this on my test site and it worked as expected.
As an example of how this “Custom” recurrence type would work, see the following screenshot for reference → https://cloudup.com/cyXt4mRMWz5
If you are using a configuration like that already, and still failing to get this to work, let us know!
Thank you,
George