Error on settings page after uploading image and saving changes.

I get errors next to all the image size types when i click save changes on the Settings screen. Don’t know if this impacts the actual watermarking or not.

Warning: in_array() expects parameter 2 to be array, string given in /home/content/78/11014278/html/site/wp-content/plugins/smart-watermark/smart-watermark.php on line 304
/> original
 Warning: in_array() expects parameter 2 to be array, string given in /home/content/78/11014278/html/site/wp-content/plugins/smart-watermark/smart-watermark.php on line 304
/> thumbnail
 Warning: in_array() expects parameter 2 to be array, string given in /home/content/78/11014278/html/site/wp-content/plugins/smart-watermark/smart-watermark.php on line 304
/> medium
 Warning: in_array() expects parameter 2 to be array, string given in /home/content/78/11014278/html/site/wp-content/plugins/smart-watermark/smart-watermark.php on line 304
/> large
 Warning: in_array() expects parameter 2 to be array, string given in /home/content/78/11014278/html/site/wp-content/plugins/smart-watermark/smart-watermark.php on line 304
/> post_feature_full_width

https://www.ads-software.com/plugins/smart-watermark/