Starbound game invites are not working

If there is a bug section for Discord, I am not aware of it. So I am posting it here:

When I'm playing Starbound, it says I can send in invite- but even if I post it in a server this message pops up from Clyde:

Your message could not be delivered because you don't share a server with the recipient or you disabled direct messages on your shared server, recipient is only accepting direct messages from friends, or you were blocked by the recipient.

Can you please fix this? Thank you.