Tipo de error: "Forbidden". Mensaje de error: "The provided API key has an IP address restriction. The originating IP address of the call (185.32.99.1) violates this restriction." Dominio: "global". Razón: "forbidden".

Did you added your own Google API key? Look at the help.

Comprueba en YouTube si el id UC6lJzi2VAF3AQw9CJK8bMpw corresponde a un channelid. Revise el FAQ del plugin or envíe los mensajes de error a support.