You haven't exported FGLLDPATH, that is why "The dynamic loader can not open dynamic module Helpers".
Secondly this line ...
call fgl_report_commitCurrentSettings() returning lo_ok
the function returns an object of type om.SaxDocumentHandler, not a smallint
https://4js.com/online_documentation/fjs-grd-1.00.00-manual-html/reportwriter/User/helpers.html#fgl_report_commitCurrentSettingshence the message about not being to convert between the two types.
Have you looked at the sample programs provided with Genero Report Designer in samples/demos