15.4 After RC1, "Problem connecting to server xxx" frequently pops up (storage server)

rt, I was outside with my Mac recently, and the Mac will frequently pop up problems when connecting to the server "XXX". The server may not exist, or it is not available at this time. According to past experience, after clicking it once, it won't be played again. Now it will basically pop up again in one minute, and it can't be ignored. After clicking it, it will pop up again, which seriously affects the use. Is there any good solution? Related: I tried to use nfs instead of smb before, but I didn't use it later. In addition, I set up a Time Machine (I used nas smb, but now I can't connect to this Time Machine outside)