Steps

Select Create in the top menu
Select Event
On the Create Event page, select the Project
Then select the Event Category being used to create the event
Add a Start Date to the event
Now that you have added a Start Time & Date, you can select the Recurring event option
In the Recurring Schedule dropdown list, select Set schedule
In the popup, select the Frequency you want the recurring events to repeat at
Select the Recurring Ending Date which is the date that the recurring events will end.
Makerble will create recurring events until the Recurring Ending Date
Add any remaining information (e.g. End Time & Date) to the Event Creation Form
Press Save
Makerble will create recurring events based on the options you chose
Those events will appear on the Manage Events page
The first event will load
Click the Add Guests button
The Add Guests popup loads
Select the contact(s) you want to add to the event
Select the Update this and all future events if you want that contact to be added to all the events in the recurring event series
The popup closes and the guest(s) are added

Makerble User Guide