Description
You may see this error in the Intel® Quartus® Prime Pro software version 18.1 when upgrading the Low Latency 40G IP from Intel® Quartus® Prime Pro software version 18.0 using a priority queue of 8 with flow control.
Resolution
To work around this problem you need to change the priority queue to 1 without flow control in the Low Latency 40G IP since a priority queue of 8 with flow control is not supported.