Debug Errors

I have WP_DEBUG on and am getting a number of errors:

Strict Standards: Redefining already defined constructor for class BE_Replace_Content_Image_Size in /wp-content/plugins/replace-content-image-size/replace-content-image-size.php on line 79

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BE_Replace_Content_Image_Size::create() should not be called statically in /wp-includes/plugin.php on line 470

<b>Notice</b>: Undefined variable: width_usr in <b>/wp-content/plugins/replace-content-image-size/replace-content-image-size.php</b> on line <b>212</b>

https://www.ads-software.com/plugins/replace-content-image-size/