WP Content Copy Protection over SSL

I am receiving the following warnings from Google Developer Console:

Mixed Content: The page at ‘https://www.bhbit.com.br/bhbit-na-revista-filantropia/’ was loaded over HTTPS, but requested an insecure image ‘http://www.bhbit.com.br/wp-content/plugins/wpcopyprotectionsu/image.gif’. This content should also be served over HTTPS.

I don’t know why do we need to load this image, but is there any way to load it on https?

Regards,

Shidartha

https://wordpress.org/plugins/wp-content-copy-protection/