Inferred type ‘S’ for type parameter ‘S’ is not within its bound

Obviously, your spring-data-jpa version is 2.x. They renamed findOne() to findById() (and changed its signature a bit).

The findOne() still exists in QueryByExampleExecutor, but it can be used only for queries by example, not for searching by primary key.

So, use this:

organisationRepository.findById(1L).orElse(null);