A few players are facing a Red Dead Online error code 0x20010006 issue while playing the game on PC, PS4, and Xbox One. Players get kicked out while playing through the introduction and trying to start matchmaking with error 0x20010006.
To fix this issue enter the mission for Red Dead Online as a solo player instead of choosing to match-make when prompted.
Hopefully, this guide resolved the Red Dead Online error 0x20010006 code issue for you. A future game RDR2 update will address this issue.