Gate Way Error when trying to install yoast plugin

wordpress

#1

when I updated Yoast SEO plugin last week it deleted it from my plugin list. Now when i try and install it again I get

“installation failed: Inactivity Timeout Inactivity Timeout Description: Too much time has passed without sending any data for document.”

I have even done loaded a zip file of yoast to my mac and tried it that way it still is not working any ideas please as this plugin is essential to my website. Host G daddy

many thanks