error when searching audit logs

When I go to the Audit log search in office 365 admin portal I get an error:

"Your request couldn't be completed. Please try again, and if the problem persists, contact your administrator.

Request: /api/UnifiedAuditLog/ Status code: 500 Exception: System.AggregateException Diagnostic information: {Version:16.00.1641.001,Environment:WEUPROD,DeploymentId:7bf1c951f4354dd78116b92e983c3a03,InstanceId:WebRole_IN_3,SID:151a5516-cd41-40f1-9f39-3bd2404c69cf,CID:a278a44b-80f5-414a-ad9e-490797937503} Time: 2017-02-20T08:22:33.3130959Z"

I am a Power BI Admin and I turned on powerbi audit a week ago.