The miner itself needs to be started "As Administrator" - right-click the .bat file and select "Run as Administrator" from the context menu. It is not enough to run it from user account that has administrator rights.
I do not use the .bat file, I run directly the miner with PhoenixMiner.exe "As Administrator" with "Run as Administrator" from the context menu.
Check if all necessary files are in the same folder as PhoenixMiner.exe - EIO.exe, EIO.dll, IOMap64.sys. Also, -rxboost will only work on GDDR5 GPUs, and -starps only on Vega GPUs. Is this a Vega GPU you are running?
Ok I have all the necessary files but I was wrong, I thought that a 5700 XT was GDDR5 and not GDDR6. Sorry for the inconvenience.