Roku Error Code 014.12 denotes network issue.

To troubleshoot Roku Error Code 014.12 , here we suggest the troubleshooting tips available

At first, verify the network credentials

Improve the weak network signal

Confirm that your Router is in ON State  

Position your device close to the Router  

For troubleshooting assistance to fix Roku Error Code 014.12 , dial the toll-free number provided