The Kunena team has announce the arrival of Kunena 7.0.4 [K 7.0.4] in stable which is now available for download as a native Joomla extension for J! 5.4.x/6.0.x. This version addresses most of the issues that were discovered in K 6.2 / K 6.3 / K 6.4 and issues discovered during the last development stages of K 7.0
I have installed, uninstalled and reinstalled Kunena three times (including removing the tables) and every time I'm getting fatal errors when I click on CATEGORY at the top of the forum:
Fatal error: Class 'smile' not found in /home/mysite/public_html/joomla/components/com_kunena/template/default/listcat.php on line 158
There is an existing bug in 1.0.9 that causes errors in category view. Perhaps it could help here too, not sure if it will be so. Please turn the announcement on in Kunena Configuration (Joomla Backend):