Playing the same game using multiple computers on the same network can cause issues, especially if your router is not deigned for this scenario.
If your router was provided by your ISP, this is something you would need to discuss and configure with them.
If your router was purchased elsewhere, you would need to contact the manufacturer for assistance
You can certainly try port forwarding, the ports you need can be found here: https://support.ubi.com/en-GB/Faqs/0...Honor-on-PC-FH
We do advise you speak to your ISP for assistance with configuring your network.