Warnings and shipping calculator

Dear all,

would you know a solution to these warnings?

Thanks!

Warning: array_intersect() [function.array-intersect]: Argument #1 is not an array in /kunden/262917_60323/website/wordpress/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-shipping-method.php on line 180

Warning: in_array() [function.in-array]: Wrong datatype for second argument in /kunden/262917_60323/website/wordpress/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-shipping-method.php on line 190

https://www.ads-software.com/plugins/awd-weightcountry-shipping/