media_buttons_context is deprecated

Hi,
I’m getting the following warning when I try to edit the page:

Deprecated: media_buttons_context is deprecated since version 3.5.0! Use media_buttons instead. in /xxxxx/wp-includes/functions.php on line 5234
PHP Stack trace:
PHP 1. {main}() /xxxxx/wp-admin/post.php:0
PHP 2. require() /xxxxx/wp-admin/post.php:187
PHP 3. require_once() /xxxxx/wp-admin/edit-form-blocks.php:436
PHP 4. do_action() /xxxxx/wp-admin/admin-header.php:123
PHP 5. WP_Hook->do_action() /xxxxx/wp-includes/plugin.php:484
PHP 6. WP_Hook->apply_filters() /xxxxx/wp-includes/class-wp-hook.php:311
PHP 7. SiteOrigin_Panels_Admin->enqueue_admin_scripts() /xxxxx/wp-includes/class-wp-hook.php:287
PHP 8. SiteOrigin_Widgets_Testimonials_Widget->form() /xxxxx/wp-content/plugins/siteorigin-panels/inc/admin.php:504
PHP 9. SiteOrigin_Widget_Field_Repeater->render() /xxxxx/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php:494
PHP 10. SiteOrigin_Widget_Field_Repeater->render_field() /xxxxx/wp-content/plugins/so-widgets-bundle/base/inc/fields/base.class.php:303
PHP 11. SiteOrigin_Widget_Field_Repeater->create_and_render_sub_fields() /xxxxx/wp-content/plugins/so-widgets-bundle/base/inc/fields/repeater.class.php:97
PHP 12. SiteOrigin_Widget_Field_TinyMCE->render() /xxxxx/wp-content/plugins/so-widgets-bundle/base/inc/fields/container-base.class.php:88
PHP 13. SiteOrigin_Widget_Field_TinyMCE->render_field() /xxxxx/wp-content/plugins/so-widgets-bundle/base/inc/fields/base.class.php:303
PHP 14. SiteOrigin_Widget_Field_TinyMCE->render_media_buttons() /xxxxx/wp-content/plugins/so-widgets-bundle/base/inc/fields/tinymce.class.php:419
PHP 15. do_action() /xxxxx/wp-content/plugins/so-widgets-bundle/base/inc/fields/tinymce.class.php:555
PHP 16. WP_Hook->do_action() /xxxxx/wp-includes/plugin.php:484
PHP 17. WP_Hook->apply_filters() /xxxxx/wp-includes/class-wp-hook.php:311
PHP 18. media_buttons() /xxxxx/wp-includes/class-wp-hook.php:287
PHP 19. apply_filters_deprecated() /xxxxx/wp-admin/includes/media.php:656
PHP 20. _deprecated_hook() /xxxxx/wp-includes/plugin.php:638
PHP 21. trigger_error() /xxxxx/wp-includes/functions.php:5234