Object reference not set to an instance of an object

I would add that any file that I access from sharepoint site is giving me this error:

Stack Trace:
Microsoft.Mashup.Client.UI.Shared.ExceptionResultException
Microsoft.Mashup.Evaluator.Interface.ErrorException: Specified value has invalid CRLF characters.
Parameter name: value ---> System.ArgumentException: Specified value has invalid CRLF characters.
Parameter name: value ---> System.ArgumentException: Specified value has invalid CRLF characters.
Parameter name: value
at System.Net.WebHeaderCollection.CheckBadChars(String name, Boolean isHeaderValue)
at System.Net.WebHeaderCollection.Set(String name, String value)
at System.Net.WebHeaderCollection.set_Item(HttpRequestHeader header, String value)

The formula is 

shared #"Set%Tracker" = let
Source = Web.Contents("https://tenant.sharepoint.com/sites/library/folder/Shared%20Documents/folder/Set%20Tracker.xlsx")
in
Source;