Clockwork API returned the following error message : Error 7: 'Content' Parameter Not Specified'

[mattab]

Got this error from the demo cron:

ERROR: Got invalid response from API request: http://demo.piwik.org/index.php?module=API&method=CoreAdminHome.runScheduledTasks&format=csv&convertToUnicode=0&token_auth=&trigger=archivephp. Response was 'task,output
API.sendReport_1,ERROR: Clockwork API returned the following error message : Error 7: 'Content' Parameter Not Specified'

[tsteur]

In b0fb017: fixes #4436 filter results in empty string if string to truncate contains the regex limiter "/"