You have to use ordinary slashes instead of the backslashes. See http://tex.stackexchange.com/questions/139401/how-to-use-graphicspath
– gernotMar 23 '17 at 08:25
@Jürgen Not the forward slash, but the backslashes, as gernot mentions. Note from that error that it interprets \Users as a macro/control sequence, which it of course isn't.
– Torbjørn T.Mar 23 '17 at 08:26
\Usersas a macro/control sequence, which it of course isn't. – Torbjørn T. Mar 23 '17 at 08:26