[Plugin: Ultimate Social Media Plus] undefined variable

I made a set of custom icons – color #000000 – in both .png and .jpg format. It doesn’t matter which set I upload, they come out #7B7979. I made sure in Photoshop that the mode was RGB and that the icon color is indeed #000000. I am getting the following error message: Notice: Undefined variable: return in XYZ\wp-content\plugins\ultimate-social-media-plus\libs\controllers\sfsi_iconsUpload_contoller.php on line 121 I did check the FAQ – this notice has nothing to do with “allow_url_fopen”. Line 121 says this: $return .= ‘<span class=”sfsiplus_row_17_1 sfsiplus_rss_section” style=”background: url(‘.$icon.’) no-repeat;”></span>’; What should I do?