Business central API v1.0 vs API beta


We need to read the general ledger entries and their dimensions from business central by using the Business central API, in the documentation we have seen that the dimensions of a ledger entries was available with the endpoint but not with the endpoint 

So we tried to use endpoint but we always get a error 404:

With the endpoint no error but we don't have the dimensions of the ledger entries:

Why the endpoint is not working ?

Thank you for your help.