Notice: Replace::recursive_unserialize_replace()

PHP: v. 7.2.10
WordPress: Version 5.3.2
Plugin: Version 3.2.1

Notice: Inpsyde\SearchReplace\Database\Replace::recursive_unserialize_replace(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "xmlSitemapGenerator\globalSettings" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide an autoloader to load the class definition in \wp-content\plugins\search-and-replace\inc\Database\Replace.php on line 355