Pshortestpath failed

[ThierryBerger]

• With the same graph as Failed to render graph #38 ; another error encountered in both https://dreampuf.github.io/GraphvizOnline and http://magjac.com/graphviz-visual-editor/ :

error:

in routesplines, Pshortestpath failed

Not sure what to think of that, I now rely on local dot command which is working fine 🎉 , but I'm documenting it in case we can report those upstream.