The export preview shows 'Enterprise Job Code for job position is not setup, Skipping'. The timesheets are for placements having a job position attribute that is not yet mapped to an Enterprise Job Code; this will need to be mapped as follows:
Click Finance & Payroll and then click Enterprise Export.
Click the Settings tab near the top of the screen.
Expand the Enterprise Payroll Job Codes heading.
Click the ✚ (plus) button at the right hand end of the heading.
Add the required mapping and click Save.