dgf-english/dutch Forbidden state - unsuccessful. Cannot get contract/bids documents in current state

GET https://dgf-procedure-sandbox.prozorro.sale/api/procedures/6020e8d44cd7657c380868d0/contracts/4eea025951c74c3ab9961429b81b5d17/documents

message: "Forbidden state - unsuccessful. Cannot get contract documents in current state"

GET https://dgf-procedure-sandbox.prozorro.sale/api/procedures/6020e8d44cd7657c380868d0/bids/6020e8d3b0781f8ccd6cf2ff/documents

message: "Forbidden. Wrong context"