The Kunena team has announce the arrival of Kunena 6.3.0 [K 6.3.0] in stable which is now available for download as a native Joomla extension for J! 4.4.x/5.0.x/5.1.x. This version addresses most of the issues that were discovered in K 6.2 and issues discovered during the last development stages of K 6.3
The error occurs if you want to open a category? By chance, this error also occurred with me at my tests. It's a incomplete saved topic. Do you have many topics in this category? The solution is rather tricky. You must search this topic and save it again.
