You have successfully installed latest NSX Content pack v4.1 in Aria Operation for Logs 8.18.3, then configured on all our NSX Managers remote syslog to it.
You see the logs coming both from NSX Managers and Edge nodes in Explorer view of Aria Operation for Logs .However, the dashboard provided by the NSX plugin are blank
Aria Operations for logs 8.18.3
For these dashboard to work, it is required that the NSX Content pack is configured after installing, Please follow the NSX setup instructions on the Content pack
Note: This is not a requirement for the log ingestion feature in VMware Cloud Director to work. Just installing the latest content pack is the requirement as mentioned in Configure a Log Provider in VMware Cloud Director