[23:06:47] [Server thread/WARN]: Player class_3222['SleepySam'/139, l='ServerLevel[ElderWoods]', x=119.50, y=76.00, z=-248.50] could not be synced because server networking isn't set up yet.

[23:06:47] [Server thread/WARN]: Player class_3222['SleepySam'/139, l='ServerLevel[ElderWoods]', x=119.50, y=76.00, z=-248.50] could not be synced because server networking isn't set up yet.

386 | [23:06:47] [Server thread/INFO]: SleepySam joined the game
387 | [23:06:49] [Server thread/INFO]: SleepySam lost connection: Invalid player data
388 | [23:06:49] [Server thread/INFO]: SleepySam left the game
389 | [23:06:49] [Server thread/WARN]: handleDisconnection() called twice

[1.17.1 Origins version]

this exact warning shows up in my server whenever I try to join my fabric server that has the mod origins in it. I tried without the mod origins and the server worked perfectly and let me join the world. Though when I have Origins mod it just doesn't let me inside the world

Not relevant any longer in Origins 1.2.0 and up, since those versions don't rely on FallFlyingLib anymore, which cause this warning.