Hi Jarret,
you are right, I got the problem solved with help from the German support topic;
https://de.wordpress.org/support/topic/link-problem-wegen-classic-editor-oder-twenty-fourteen-theme/#post-73325
At the end, it was the Broken Link Checker (1.11.9, actual version), that got an “999” error with existing LinkedIn Profiles (all problem Links where pointing to existing LinkedIn Profiles).
The subject is solved with telling the Link Checker that the link is fine.
Thanks for your help
Dirk
