VMware NSX
VMware Aria Operations for Logs 8.18.6
The port protocol on the NSX logging server was incorrectly configured. Specifically, the protocol was set to "LI" (or incorrectly identified as "LL"), which prevented successful log transmission to Aria Operations for Logs.
To resolve this issue, modify the logging server configuration to use a standard protocol that is compatible with the Aria Operations for Logs listener.
Additionally, see: Aria Operations for Logs cannot be set as logging target in NSX