error in calculate trajectory

[rdf1993]

scData <- RunMonocle3(srt = scData,clusters = "cell_fate", graph = "scVI_SNN")
Whether to use partitions to learn disjoint graph in each partition?

1: TRUE
2: FALSE

Selection: 2
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Error in scale$guide == "none" :
comparison (==) is possible only for atomic and list types
In addition: Warning messages:
1: No shared levels found between names(values) of the manual
scale and the data's fill values.
2: No shared levels found between names(values) of the manual
scale and the data's fill values.