JS TypeErrors

Hi,

Since the last update I receive these errors when saving pages in the backend.

TypeError: b is null
http://somewebsite.com/wp-content/plugins/wordpress-seo/js/dist/yoast-seo/yoast-seo-305.min.js?ver=3.0.6
Line 1

TypeError: b.responseText is undefined
http://somewebsite/wp-content/plugins/wordpress-seo/js/wp-seo-post-scraper-305.min.js?ver=3.0.6
Line 1

Hope you can help.

Cheers,
Jaap

https://ww.wp.xz.cn/plugins/wordpress-seo/