Workflow error running Mageck vispr test data

[Former user]

Hi,

I am experiencing an error when I followed the pipeline configuration.

WorkflowError in line 13 of /Users/zhe/Downloads/esc-testdata/reads/Snakefile: Config file is not valid JSON or YAML. In case of YAML, make sure to not mix whitespace and tab indentation. File "/Users/zhe/Downloads/esc-testdata/reads/Snakefile", line 13, in <module>

Anyone knows what's going on?

Thanks!