Ultrasound has detected that FRS on the specified server is stopped. This might indicate that there was a USN journal wrap or that the server no longer has connections to any partners. This could also indicate that replication was purposefully disabled on a DFS replica set in the Distributed File System snap-in.
Verify whether replication was purposefully disabled. In the case of a journal wrap, refer to the topic USN Journal Wrap. Otherwise, verify the state of FRS by running FRSDiag.