Error al importar archivos

Hola tengo un problema no puedo importar archivos excel y no se pueden cargar librerías

Ahoy Mauricio,

This site is mostly (if not almost completely) in English. I'd suggest translating your question into English to have the best chances for getting help here.

Further, your screenshot is not super help in explaining what's happening?

In terms of advice on loading data into R:

Importación de datos con RStudio, (Translated from the original: Importing Data with RStudio)

Also here's a bunch of spanish language cheatsheets: