You may see this Critical Warning message in Intel® Quartus® Prime Pro Edition Software version 22.1 and earlier when compiling an Intel® Stratix® 10 design containing the High Bandwidth Memory (HBM2) Interface Intel® FPGA IP.
The warning will be associated with missing location assignments for m2u_bridge conduit signals.
This message can be safely ignored for the m2u_bridge conduit signals since they are not connected to physical pins.
This message will be automatically suppressed starting from Intel Quartus Prime Pro Edition Software version 22.2.