This version is now depreciated. The new version: https://github.com/UE4-OceanProject/Environment-Project has mostly the same stuff, minus the bloat, and is better organised, and has many fixes, and will continue to be updated by the community (Hopefully)
If you are actually looking for the legacy Ocean Community Project, you can find the last updated on these branches https://github.com/UE4-OceanProject/OceanProject/tree/MASTER_LEGACY_FINAL_4.22
https://github.com/UE4-OceanProject/OceanProject/tree/MASTER_LEGACY_FINAL_4.25