There are different scenarios that can cause this message to pop up:
You’re connected, but not with the correct address. Maybe you meet the requirements - you have the specific tokens, you are on the allowlist, etc. - but you have multiple addresses, and right now you use the one that can’t get you in. In this case, double-check your connected wallet and linked addresses in your Guild.xyz Account whether you use the correct one to get your roles.
Your address is connected to another Discord ID.
If none of the above fixes the issue, this is unfortunately due to a bug with guild. In this case, please escalate to the Bebop team and/or contact the Guild.xyz team on Discord so that we can solve your issue.