Enable field Access for core fields in Backend
- In file /administrator/components/com_jsn/views/field/tmpl/edit.php at line 187 replace this:
<?php if($this->item->core) $this->form->setFieldAttribute('access','disabled','true');echo $this->form->getInput('access'); ?>
with:
<?php if(false) $this->form->setFieldAttribute('access','disabled','true');echo $this->form->getInput('access'); ?>