Can someone tell me what does this mean
Maybe this might help
i don’t have any antivirus in this computer
Did you checked that your localhost ip address is accessible in phone’s browser?
it is accessible
Try uploading PHP script on 000WebHost and also import & export your localhost database to 000webhost database and see whether you are getting same error or not.
Is your localhost server running?
Is your IP address open from mobile phone if yes then share an screenshot.