Looking for source codes? Take a look at other branches. Codes in retro branches are outdated and unsupported while modern branches are supported.
1.16.5+ : https://github.com/MCTeamPotato/Kasualix-Issue-Tracker
1.12.2-: https://github.com/Ecdcaeb/Redirector/issues