UPDATE: Restarting my computer solved this. Hopefully this helps anyone else who has a similar issue!

I'm having a strange issue on my new PC when I host games. My friends are able to connect, but they can't ready up. I'm able to hit the ready button and I see the checkmark on my portrait, but no one else is able to. I tested to see if it was a networking issue by hosting a game on my laptop and everything worked fine on that end, so I'm pretty confused! I've tried uninstalling and verifying through Steam, but haven't had any luck. I'm out of ideas, so hopefully someone can help me out with this! Thanks in advance!