forti collector agent cannot view event log

Hello! I have setup FSSO for windows active directory on my fortigate 100d and on a domain joined server. under User & device > authentication >single sign-on i have my fortinet single sign on agent. and the status shows a green check mark. so the fortigate and the collector agent can speak to each other(if i understand this correctly) But my user field under log & report > traffic log > forward traffic does not populate. I check the collectoragent.log on the collector agent and i get this error: [ 6060] [EPPoller]Could not open the event log on:dc1.domain.local (e=1314) But, when i check " show monitored DCS" i get an increasing amount of logon events. How do i troubleshoot this issue?