Error 2975: Number of weeks which regular childcare provision is open is missing or out of the range 1 to 15
The error will show if the 'Childcare Week Open' field is left empty or not in the range of 1 to 15 when adding childcare details for holiday childcare.
To amend this go to Admin > Census > Spring Census > Childcare details (in the Census Specific Data).
In this area click edit next to the holiday childcare entry to amend, enter the weeks open and then click update to save.