readtable talks to excel on Windows with Excel installed, and on other systems uses internal routines. I am using Mac, which never talks to Excel; on my system, readtable() is happy with the file in R2016a,R2017a, R2018a (I did not try other versions.)
I suggest you experiment with
[num, txt, raw] = xlsread('Nuevo.xlsx');
I speculate that you will see an error message about an exception with a hex code that starts 0xC000 something. If so then that could suggest that you might have an Excel add-in such as FoxIt that is causing problems.
If you do see an error message with xlsread() then try
[num, txt, raw] = xlsread('Nuevo.xlsx', 1, '', 'basic');
That will force it to use the internal routines. When you do that then the dates you get back in the first column will be numeric and will be Excel date numbering system; you can convert to more readable form using datetime() with the option 'convertfrom', 'excel':