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Using ftp upload file from wp-content/plugins/meta-data-filter/views/to_theme/template-meta-data-filter.php to the folder of your current WordPress theme. This template is necessary for the plugin functionality.
You can also download the same zipped template from here. Download, unzip and then upload it to the current WordPress theme folder of your site using ftp ...
Reason: sometimes site hosting companies because of security reasons makes wp theme folders for 'read only', it is very good for security, but in such case the template have to be upload by hands 😉