Slingshot not working in README

[moi-taiga]

D was unable to produce a trajectory.

README code:
sce <- slingshot(sce,
clusterLabels = "seurat_clusters",
start.clus = "2",
end.clus = "1",
reducedDim = "UMAP")

D Code:
sce <- slingshot(sce,

•               clusterLabels = "Tumour_celltype",
  

•               #start.clus  = "2",
  

•               #end.clus = "1",
  

•               reducedDim = "UMAP",
  

•               useNames = TRUE)
  

Error: useNames = NA is defunct. Instead, specify either useNames = TRUE or useNames = FALSE.

Needs testing and more information.
Which Slingshot version is being used?