Fitter Error while using DDR4 in project. (Error (14566): The Fitter cannot place 1 periph component

For an Arria 10 SoC device, there is a very specific I/O bank you have to use for the EMIF for the HPS. I forget which one it is right now but remember that for HPS EMIF, it uses the same hardware as if you were adding an EMIF without the HPS. Thus, if you've located anything in the dedicated I/O bank that is required for the HPS EMIF, you'll get a no-fit like this. If you're using Quartus Prime Pro, you can use the Interface Planner to find the legal location for this EMIF. If you're using Standard, check the device user guide to find where the EMIF has to go and check in the Pin Planner if something is interfering.