fixed it

Author: Anthony David Gruber

_config.yml

@@ -107,7 +107,7 @@ author:
   instagram        :
   impactstory      : #"https://profiles.impactstory.org/u/xxxx-xxxx-xxxx-xxxx"
   lastfm           :
-  linkedin         : "https://www.linkedin.com/in/anthony-gruber-b646b7280"
+  linkedin         : "anthony-gruber-b646b7280"
   orcid            : "https://orcid.org/0000-0001-7107-5307"
   pinterest        :
   soundcloud       :