windows server 2019 DFS manger

Question

There is a problem with my DFS management server. Open Namespaces to view the setting information. After clicking it, an error is displayed, "the namespace cannot be queried, the specified domain either does not exist or cloud be contacted". Check in the event viewer, event ID: 12317, regarding the error of SRMSVC, the same prompt "the specified domain either does not exist or cloud be contacted". The previous use was normal, but this problem suddenly appeared the day before yesterday.

I looked up the information, checked the users permissions of the AD domain according to this, and there was no problem.
https://techcommunity.microsoft.com/t5/storage-at-microsoft/troubleshooting-event-id-12317-8220-file-server-resource-manager/ba-p/423302

I checked the network communication status between the DFS file server and the AD domain. Everything is normal. The root cause of the problem has not been found and cannot be investigated. I hope to get guidance. Some screenshots of the error are as follows.