The Kunena team has announce the arrival of Kunena 5.2.4 [K 5.2.4] which is now available for download as a native Joomla extension for J! 3.9.x. This version addresses most of the issues that were discovered in K 5.2 and issues discovered during the development stages of K 5.2.4

REQUIREMENTS
Blue Eagle 1.6.x requires Kunena 5.2.x to work with, this template isn't designed to works with Bootstrap 4.