How to Build a WiFi LAN between PC and Hololens through Mobile Hotspot?

Hello everyone!
I have activated a mobile hotspot, and my PC is connected to this hotspot. The displayed IP address is 192.168.43.105
Then I built the PhotonServer v5 server on this PC
Then, in the Unity project, establish a connection with PhotonServer using PUN。
Running this project on this PC shows successful connection to the server。Then, I opened Hololens and connected to the mobile hotspot. The IP address assigned to the hotspot is 192.168.43.32。Then, I publish the project to run on Hololens。However, when I published the project to Hololens, I was prompted that the server connection failed!The error prompt is as follows:
Receive issue.State:Connected.Server:'127.0.0.1' ErrorCode:10054 SocketErrorCode:ConnectionReset Message:Connection reset by peerSystem.Net.Sockets.SocketException(0x800004005):Connection reset by peer at System.Net.Sockets.Socket.Receive(...)
Then, on the PC, I used the ping command to ping 192.168.43.32, prompting for a timeout request
Excuse me, isn't the hotspot on the phone connected to the PC and Hololens on the same network? How to solve this problem? thank you!