Jeanne,
Well the error message is greatly helpful! If you review the error data, it tells you what permissions they are missing.
<URL>/_common/error/errorhandler.aspx?BackUri=http%3a%2f%2fmeicrm.mei.chemring.net%2fCORCR%2fworkplace%2fhome_dashboards.aspx%3fpagemode%3diframe%26sitemappath%3dWorkplace%257cMyWork%257cnav_dashboards&ErrorCode=0x80040220&Parm0=%0d%0a%0d%0aError%20Details%3a%20Principal%20user%20%28Id%3da48ea861-21bf-e211-822e-005056ad07ae%2c%20type%3d8%29%20is%20missing%20prvReadWebResource%20privilege%20%28Id%3d4156db68-93e2-4a83-8cbb-5bb344ebaf47%29&RequestUri=%2fCORCR%2fHandlers%2fWebResource.ashx%3fname%3dRibbon_main_system_library.js</URL>
This error is complaining about prvReadWebResource.
