Plugin disappeared after WordPress update, unable to re-install

The Events Calendar plugin disappeared from my site Friday around the time of the WordPress upgrade to 5.0. I didn’t notice it was missing right away so I’m not 100 percent sure it went away. But there was briefly a message about it when I went to my installed plugins page. It disappeared before I could screenshot it.

However now I’m unable to re-install the Events Calendar when I go to the Add Plugins page. Here’s the message I’m getting: Installation failed: Inactivity Timeout Inactivity Timeout Description: Too much time has passed without sending any data for document.

I can send someone a screenshot if that helps.

The page I need help with: [log in to see the link]