failed to download of NMF results and NMF plot

[zhuxqdoctor]

Hi,
I was running sake using Rstudio in linux. I got five NMF clusters output. However, I could not download the NMF results as well as the NMF plot. The details are as below:
for NMF results download:
ERROR: None of the features passed through default NMF filtering criteria, please manually specify number of genes from each group or use 'select features by Rank'.
for NMF plot download:
ERROR: Invalid empty subset object subsetRow.
Does anyone know what these error means and give me some suggestions. Thanks.

[naikai]

Usually it means the features in each of the clusters does not pass through the minimum threshold.
Please refer to this for more information:
https://www.rdocumentation.org/packages/NMF/versions/0.21.0/topics/featureScore

Optionally, we provide the option to specify the number of features (Rank by different metrics) for each cluster. This will return the number of features for each cluster.

HTH