Brewster Hi, when you enable Windows 10 Mobile Hotspot, there will be two ip addresses. Please click the "Add" icon at the top right corner of the Network interface, and input the original ip address (instead of the new ip address after enabling hotspot) to access your laptop.
You can check the ip address of your laptop from CMD. Press Win + R to open the Run box, type "cmd" and hit Enter, then type "ipconfig", and press the Enter key.