K2 is not compatible with Joomla 5 yet... So, you have to choose, either use Joomla 5 (and other components) OR use Joomla 3 with K2. For more, read the blog:
[url=https://K2 is not compatible with Joomla 5 yet... So, you have to choose, either use Joomla 5 (and other components) OR use Joomla 3 with K2. For more, read the blog: https://getk2.org/blog/k2-v2-11-rolling-releases-joomla-4-and-more]
getk2.org/blog/k2-v2-11-rolling-releases-joomla-4-and-more[/url]