Hey Miguel, do we need to install anything? I'm receiving some bootstrap error! Sorry I'm new in html/css

Hola, aquí el snippet actualizado → https://goo.gl/nsVK7W...y link para descargar si es necesario, debo decir que cuando realice la actualización no me dio problemas como el anterior, era como que no aceptaba el .text-center

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Hello, here the updated snippet → https://goo.gl/nsVK7W ... and link to download if necessary, I must say that when I did the update it did not give me problems like the previous one, it was like I did not accept the .text-center