Chrome extension

I am currently in the USA and having a problem installing the Language Reactor Extension on my toolbar. After I hit ‘install extension’ (Language Reactor) in the Chrome Extension Store, I receive the following ERROR MESSAGE - “Package is Invalid: CRX_FILE_NOT_READABLE”

Here is a link to the page with the the bug: (https://chromewebstore.google.com/detail/language-reactor/hoombieeljmmljlkjmnheibnpciblicm) if it helps.