What to you have set as the return format for that date field?
That’s the value you are using to create the new DateTime object so it needs to be in a format that it understands.
http://php.net/manual/en/datetime.formats.date.php, to be honest, looking at that page I can’t say if 26 January, 2016 is a value it understands, I find it a bit confusing.
You can also do $dateFrom = new DateTime(get_field('date_from', false, false)); the second false tells ACF not to format the value and I know that the unformatted value will work.
