The red X indicates that the Wi-Fi radio is off. There is not a problem with your printer, this is normal.
To connect your printer using a wireless connection:
- On your printer, press Home, then select Network Settings.
- Select Turn Wi-Fi radio ON, then press OK.
- Follow the on-screen instructions to complete the setup.
This applies to ESP C310, C315 and newer Wi-Fi capable printers.
It doesn't apply to legacy printers (ESP 9250 and older Wi-Fi capable printers).