Exceptions in calls to OneDrive graph API

Question

Today we started to get exceptions in a previously normally working solution like the below from the Graph API calls to v1 endpoints of group's "OneDrive" (GET /v1.0/groups/xxxxx/drive/root:/.)

" Microsoft.Graph.ServiceException: Code: unauthenticated. Message: Role Claim does not exist for Service Asserted App V1. Inner error at Microsoft.Graph.HttpProvider."

Any clues where to look at for troubleshooting?