Check on both laptops if you have the metered connection turned off. This sometimes restrict the Wireless Display instalation. You can see it in:

Settings > Network & Internet > Wi-Fi > select the Wi-Fi network you’re connected to

Turn off the metered connection to remove the data usage limit and Restart your computer .

If the metered connection is already turned off or this solution did not solve the problem you should try to clear the System Cache because it can be corrupted. Do it on both laptops.
To do this you have to run command prompt as administrator:

• type CMD or command prompt in the search bar
• right click on it and Run as administrator
• run this command: ipconfig /flushdns

I hope this solves the problem.