diff -Nur a/src/ResourceType/ConfigurableResourceTypeRepository.php b/src/ResourceType/ConfigurableResourceTypeRepository.php
--- a/src/ResourceType/ConfigurableResourceTypeRepository.php	2018-05-04 01:23:30.000000000 -0400
+++ b/src/ResourceType/ConfigurableResourceTypeRepository.php	2018-06-27 09:55:43.000000000 -0400
@@ -168,7 +168,7 @@
   /**
    * {@inheritdoc}
    */
-  public function getPathPrefix() {
+  public function getBasePath() {
     return $this->configFactory
       ->get('jsonapi_extras.settings')
       ->get('path_prefix');