I'm having several problems with the E-newsletter plugin.

I'm having several problems with the E-newsletter plugin.

It does not open my media library I use for my images.

When I click the "Submit" button it returns me the following message and stays with white screen:

Notice: load_plugin_textdomain was called with an argument that is deprecated since version 2.7 with no alternative available. in / home/portaltrai1/public_html/wp-includes/functions.php on line 3008

Notice: Constant already defined in ST_URL / home/portaltrai1/public_html/wp-content/themes/magazon-wp/st-framework/st-load.php on line 27

Had to uninstall to run the rest of the features.

I need help and I need to use this plugin.