Slow performance/intermittent error unable to load timesheet data is seen in the New User Experience for users with non admin rights.
This issue is seen when clicking on the View button when attempting to view another resource's timesheets. It happens for users with limited access rights such as resource managers.
Release : 15.4.1
Have your DBA check to see if there are any slow running queries, if so, using SQL Tuning Advisor can provide recommendations to optimize performance (including rebuilding the execution plan any slow running queries can help resolve the performance issue).
Contact Broadcom Support for assistance.
Note: Generating a Clarity Action trace while reproducing the issue can help in determining if there are any slow running queries causing the issue (see steps to enable action trace at: Using Clarity Action Trace)