Mismatched entity and/or field definitions
The following changes were detected in the entity type and field definitions.
- The node.field_flexslider_example_slidesh field needs to be uninstalled.
- The node.field_flexslider_example_image field needs to be uninstalled.
How to solve:
- https://www.drupal.org/node/2601762#comment-10835098 > This work
Put this code before '$response->send();'
Refrech the website - the error should gone "
* After that - remove back the above code