You want to track a link with an encoded hex character e.g. cl.linkedin.com/in/nicolás-palacios-52528a21/ but when you add it in you get an anomalous link or simply no ranking.
First find the URL to track, then copy link address. In this case, you'll get: cl.linkedin.com/in/nicol%C3%A1s-palacios-52528a21
Tick off "Exact" in serpbook and paste in the URL and keywords.