This may or may not be relevant but might help somebody.   We cloned AEM from Prod 6.4.8 2012  Win 2012 to lower environment  Win 2019.  upgraded from 6.4.8 to 6.5.15 and also upgraded Oracle Java 8.21 to Zulu 11 64 Bit. Everything worked fine with java 8 but as soon as sa i switched to Java 11.. it...

Did you get it resolved?  I have similar problem AEM Upgraded to 6.5.14 and it works with JDK 1.8 but gives same error  JDK 11.

Here is my finding on livefyre.I confirmed with adobe product Team that livefyre, its public chat and not private chat one to one. it does not meet the requirement.