This is a new colony started on the RU preview branch. I built the exosuit docks first, powered with oxygen starting to be pumped in and all exosuits on the docks. After all that was complete I built the checkpoint but the docks not directly touching the checkpoint all show the error of no checkpoint existing.
I have deconstructed/reconstructed in order the checkpoint, the closest dock to the checkpoint and the second closest but the issue persists. The dupes appear to be using the docks and checkpoint normally despite the error indication.
Built more than one exosuit dock and then a single checkpoint at the end of the line.