5.0 lollipop – Not able to flash OPPO A53 with QFIL

I am using QFIL tool to flash OPPO A53 in window10 .I can see the final output in QFIL as Downloaded successfully. But mobile isn’t flashed.I found error in QFIL logs.

**ERROR: ReadPort:5915 Could not read from '\.COM13', Windows API Read File failed! Your device is probably *not* on this port**