Error message using "issue in updatedBy" in filter for "Filters Activity Stream for Cloud" plugin

[Michael Sabolcik]

I am attempting to use the Filters Activity Stream Plugin to create a dashboard for our senior leadership.  I've created a filter in Jira that uses the "issue in updatedBy" operator using my username "Michael.Sabolcik" as the variable.  It runs fine in the filters view but when I use the filter in a the Dashboard Item I get the following error: 

The filter returns an internal error : { "status": 400, "statusText": "", "responseText": "{\"errorMessages\":[\"This user doesn't exist.\"],\"warningMessages\":[]}" }

Any help is greatly appreciated