rsql-jpa error while searching by one-to-many

Question

The project uses com.github.tennaito.rsql-jpa. I'm trying to build a filter like this: refPersonByPersonId.rsysUserByRsysUserId.rsysFRoleUserByRsysUserId.rsysFRoleByFRoleId.froleUserId==304, and I get the error: org.hibernate.query.criteria.internal.path.SingularAttributePath cannot be cast to javax.persistence.criteria.From

If you build a simpler filter like refPersonByPersonId.id == 10, then everything is fine.

The structure of the object below is given in json format (what I get at the output from the api).

{
  ...
  "refPersonByPersonId": {
    ...
    "rsysUserByRsysUserId": {
      ...
      "rsysFRoleUserByRsysUserId": [
        {
          ...
          "rsysFRoleByFRoleId": {
           ...
            "froleId": 304
          },
        },

Maybe someone worked with rsql-jpa and such a problem when a one-to-many query is needed.