Hi there TheHauntedSkies. First off, welcome to the Forums! I'm sorry that this issue with inviting and joining friends is what brings you here, however. Just to confirm, are you encountering this issue while playing the game on Windows 10?
Also, I see that you've completed some extensive connectivity troubleshooting steps. Thanks for listing those off for me! Since you're still encountering this issue, however, I recommend verifying your game files as well.
Also, I see that you've completed some extensive connectivity troubleshooting steps. Thanks for listing those off for me! Since you're still encountering this issue, however, I recommend verifying your game files as well.