Has anyone encountered this error executing a dataset using runPaged?

"name":"SSS_SEARCH_ERROR_OCCURRED","message":"Search error occurred: Invalid or unsupported search"

I am loading a dataset in a mapreduce script and using query.runPaged to get the results. That has worked fine up until a couple weeks ago. The error does not occur if I use query.run and the dataset runs successfully in the UI. Any ideas?