Thank you @Acrefawn
I think there is some issue with Bminer v5.3.0 .. I open the script .. 3sec blue CMD window close
same here .....
may be a log will welcome to know what's wrong

start script one time , autoclose , no new file ....
restart script "Config_Bmnr.ini" file was made and end
restart again , some cmd windows start & turn off without see something in

and got red windows
Something is wrong...
Miner ran for 00:00:00
Miner restarting...
+================================================================+
Please wait 30 seconds or press any key to continue...
again and again

# Set main server miner command here to auto-create miner.bat file if it is missing or wrong. [keep default order]
commandserver1=bminer.exe -uri stratum://t1S8HRoMoyhBhwXq6zY5vHwqhd9MHSiHWKv.fr190[:x]@eu1-zcash.flypool.org:3333 -logfile miner.log -max-temperature 80
i had that problem as well, so i deleted the
[:x] in the config.ini file
# Set total average hashrate of this Rig. [you can use average hashrate value from your pool]
hashrate=0
i also kept hashrate=0 at default since bminer takes several minutes to report the current hashrate. really wished bminer would change that.