When I build and run my files locally, I don't get any error however when I test my algorithm on the first .tif file I get the following error,

"The output file 'stacked-referable-glaucomatous-features.json' is not valid. JSON does not fulfill schema: instance should be non-empty"

I have tried with different datatype submissions as well although the one in the base algorithm inference is boolean. Is there a specific format in which I need to return the features?