Steps to reproduce:
1. Go to „Schedule Recording“
2. Select „Group of Recordings“
3. Enter title, presenter, … and a new series name
4. Click on „Schedule“
The UI will complain that there is „Missing or invalid input“ and tells me „Please enter a Series name for this group of recordings.“ even though there is a name for the series (have a look at the attached screenshot).
Workaround (if any):
Create the series prior to the schedule.