I have problems with R package getReturns. I have encountered this error since 17th May:
Warning in file(file, "rt") : cannot open URL 'http://ichart.finance.yahoo.com/table.csv?s=AAPL&a=4&b=28&c=2014&d=4&e=27&f=2017&g=w&ignore=.csv': HTTP status was '404 Not Found'
It looks like that ichart API did not run anymore. Can anyone help me with this issue? Does someone know how to fix it? I have encountered the same issue with the quantmod R package.