There was a problem loading "maximum-degree-bounded-connected-subgraph.ipynb" in hard-problems-formulations.

Error: ENOENT: no such file or directory, lstat '/var/data/cocalc/4dea19db-f2e2-4175-bc0b-f84bc59c2366/hard-problems-formulations/maximum-degree-bounded-connected-subgraph.ipynb'