Leidenalg not found error

[SimonDMurray]

When running the single cell RNA seq course last week. We found that the command:
srat <- FindClusters(srat, verbose = F, algorithm = 4, resolution = 0.9)

produced the error:
Error: Cannot find Leiden algorithm, please install through pip (e.g. pip install leidenalg).

even though the dockerfile contains:
RUN pip install --upgrade --no-cache leidenalg

This error occurred when students tried to run the Seurat notebook through Rstudio.

[SimonDMurray]

This was in chapter 8: https://www.singlecellcourse.org/single-cell-rna-seq-analysis-using-seurat.html