Inconsistency in the variable type of the function

[Gonzalo2310]

When I make ajax calls I get a plugin error.
Looking at the code I found this in: wp-media-categories/wp-media-categories/includes/functions.php

function wp_media_categories_update_count_callback( $terms = array(), $media_taxonomy = 'media_category' )

$prepared = $wpdb->prepare( $sql, $media_taxonomy->name, $media_taxonomy->name );

$media_taxonomy is defined as a string but used as an object.