Errors with filefieldpaths module

LAMP Ubuntu 16.0.1, Apache 2.4.18, php v7.0.22, mysql 14.14,
Drupal 8.3.1 with latest FileField Paths (8.x-1.0-beta1) module installed.
Development server: is not ssl.

I used your CLI composer install instructions, generated keys and saved them outside the webroot. Then saved the configuration.

First step then was to create a consumer on the 'Clients' tab at /admin/config/services/consumer/add . It fails with this error:

Error: Call to undefined method Drupal\Core\Field\BaseFieldDefinition::getThirdPartySettings() in filefield_paths_field_widget_form_alter() (line 217 of modules/contrib/filefield_paths/filefield_paths.module).
filefield_paths_field_widget_form_alter(Array, Object, Array) (Line: 501)
Drupal\Core\Extension\ModuleHandler->alter('field_widget_form', Array, Object, Array) (Line: 333)
Drupal\Core\Field\WidgetBase->formSingleElement(Object, 0, Array, Array, Object) (Line: 162)
Drupal\file\Plugin\Field\FieldWidget\FileWidget->formMultipleElements(Object, Array, Object) (Line: 84)
Drupal\image\Plugin\Field\FieldWidget\ImageWidget->formMultipleElements(Object, Array, Object) (Line: 104)
Drupal\Core\Field\WidgetBase->form(Object, Array, Object) (Line: 168)
Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm(Object, Array, Object) (Line: 122)
Drupal\Core\Entity\ContentEntityForm->form(Array, Object) (Line: 115)
Drupal\Core\Entity\EntityForm->buildForm(Array, Object) (Line: 19)
Drupal\consumers\Entity\Form\ConsumerForm->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 514)
Drupal\Core\Form\FormBuilder->retrieveForm('consumer_add_form', Object) (Line: 271)
Drupal\Core\Form\FormBuilder->buildForm('consumer_add_form', Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 67)
Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

I have tried uninstalling, reinstalling, and tried on a different server. Same error. I also tried checking the oauth option on my REST resource before trying to create the Consumer. I also tried checking all the SimpleOauth Access Token permissions. No difference.

Any thoughts?