((resource:yioop.PNG|Resource Description for yioop.PNG))

-- why says that The following required items were missing: Process Creation Functions (popen, pclose, and exec needed for crawling

Yioop makes use of those functions to create background processes for crawling. If you don't have them installed you can't use the Manage Machines interface to start and stop Queue Server and Fetcher processes. Have you tried to install Yioop using one of the install guides? [[https://www.seekquarry.com/p/Install|https://www.seekquarry.com/p/Install]]