Sample notebook is having problem

Bloqade
4 
qubo_graph, qubo_weights = UnitDiskMapping.graph_and_weights(qubo.grid_graph)
locs = coordinates(qubo_graph)

This code is giving error

MethodError: no method matching coordinates(::SimpleGraph{Int64})

Closest candidates are:
  coordinates(!Matched::GridGraph)
   @ UnitDiskMapping ~/.julia/packages/UnitDiskMapping/gcgPy/src/Core.jl:78
  coordinates(!Matched::MappingGrid)
   @ UnitDiskMapping ~/.julia/packages/UnitDiskMapping/gcgPy/src/mapping.jl:71


Stacktrace:
 [1] top-level scope
   @ ~/Programs/Hardware Tracks/QuEra/codes/bloqade/bloqade_julia/bloqade3.ipynb:1