The plugin does not work

I have tested in on two blogs:

1. First blog – WP Ver. 4.1.1 – when you publish the blog, only a blank white page is returned. The post is published in the blog, but in the admin – it stays white blank. No error returned.

2. Second blog – WP Ver. 4.7.2 – I couldn’t even activate the plugin. It said that there was a fatal error. The plug has installed but I couldn’t activate it.