After upgrading the IBM FileNet Content Platform Engine (CPE) to V5.2.1, users receive an error when logging into Workpl

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After upgrading the IBM FileNet Content Platform Engine (CPE) to V5.2.1, users receive an error when logging into Workplace XT. After troubleshooting the issue the CPE Client Files need to be updated on the Workplace XT application server. The installation file was executed and ran successfully with no errors. After updating the client files the issue still persists.What further step needs to be taken to resolve the issue?

A. Clear the Temp directory on the deployed Workplace XT directory and restart Workplace XT.
B. it is possible the client install file was corrupted during the download. Download and reinstall.
C. Stop and start the Workplace XT instance(s) and CPE instance(s) on the application server(s).
D. Redeploy Workplace XT after installing the CPE client files on the associated Workplace XT application server(s).