Folder C:\inetpub\wwwroot\Reportes\bin may not be the location used by ReportPortal virtual directory. Please open IIS console and see where ReportPortal virtual directory is pointing to.
The problem was resolved. Hot fix: 1. Download and unzip: http://www.reportportal.com/download/rp_183_IE9_SVG3.zip 2. Backup old files to an external folder and copy the unzipped files to: "C:\inetpub\wwwroot\ReportPortal\bin\ReportPortal.dll" 3. Clear browse r cache (control-shift-delete)