1. Get the wordpress 6.0.x as the base package for bbpress.
2. Install and activate bbpress and bbp style pack plugins manually in 6.0.x softaculous installation. Go to bbp style pack plugin settings and enable the basic theme support. https://bbpress.org/forums/topic/url-goes-blank-on-creating-forum-topic-in-bbpress-2-6-11/
3. Take the files and sql dumps of that installation and compare it with the downloaded one.
4. [IMP] If there is a difference in bbp style pack, check the move the modified package to our zip. Check install.php for code.
5. [IMP] If there is no change in the package use the call user function to fetch the latest package. Check commented code in install.php
6. Check the sql entry in manual installation. (We have handled in our install.php)
7. Test the plugin by creating a forum and accessing it's front end and backend.
8. If there is new version in bbp_style_pack plugin, change the version in call_user_func in install.php 