Blank page in some plugins

Hi,
After upgrade and re-installing the all site, i am having somre dificulty with some blank pages in two plugins.

My site is in https://www.elcantabroperplejo.com

One of the problems is in wp-email.php that you can see f.e. in https://www.elcantabroperplejo.com/?p=746&email=1

I have no idea on how to resolve this.

Thanks