Fascing the problem while security approver is approving the request.
Error in Processing your request, Request no: 1006 in stage : ZSECURITY
Thanks & Regards
I guess, you are on AE 5.2. Please make sure, if the approver at your ZSECURITY stage approving the request by clicking the email message link and login onto AE and then go to User Login to see requests to approve.
If this is the last stage in the linear path of your workflow, make sure SAP system is not down. If not, check if the next approver at next stage is defined in the path.