Attempts to protect the agent times out during metadata gathering step (4042206)

Trying to protect or re-protect the existing agent machine times out on gathering metadata. Error:

Protecting fails with error "System.Net.WebException depth 3: The operation has timed out" on last step in protection wizard.

ERROR 2018-09-14T14:06:02 [6777] - Replay.Core.Client.AgentsManagementCoreClient ()
Timeout executing [PUT https://localhost:8006/apprecovery/api/core/agents/query/metadata] after 00:08:00.0136725
Microsoft.Http.HttpStageProcessingException depth 0: GetResponse timed out (0x80131501) ---> System.TimeoutException depth 1: GetResponse timed out (0x80131505) ---> System.Net.WebException depth 2 (0x80131509) ---> System.Net.WebException depth 3: The operation has timed out