Error response during RestAction in Redwood Existing Absences

Hi all

This week we've noticed that users with a custom Line Manager role are seeing an "Error response during RestAction" error msg when accessing Redwood 'Existing Absences'.

I've tried adding the seeded LM role to a user which fixes the problem, but I'm not yet sure which privilege in that role we need. However, it's odd because the problem started occurring very recently, and we've had this page available for months.

I've raised an SR but I'm wondering if anyone else has had this problem?

Thank you