Attempt to install beta 6.0.0 on J5.4 resulted in:

An error has occurred.

0 Failed opening required '/homepages/35/d979819093/htdocs/j5/components/com_cjforum/helpers/constants.php' (include_path='.:/usr/lib/php8.3')

Additionally database issue shown:

CjForum Modern community forum component with single page application interface. Features responsive design, real-time updates, and comprehensive discussion management.	Administrator	Component	One Problem	6.0.1	‎6.0.0