Hello Reaper, thank you for your post.
If you have lost a connection to the server, it may be because of browsing the internet and using them both simultaneously.
Please try resetting your game and router to re-establish a new connection with our servers, and disconnect any devices from your internet connection you are not currently using whilst playing the game to allow more bandwidth to be used by the game.
If you continue to receive disconnects after following these steps, please run through all steps listed in this guide - this can help rule out if the issue is caused by online services, ISP, software, router, hardware issues, or the game itself >
PC >
https://www.ubisoft.com/en-gb/help/article/000094617STEAM >
...
Read more