After changing theme, getting connection timed out message

Hello,

I switched my theme to Custom Community (https://www.ads-software.com/themes/custom-community/) and then got hit with this message:

This site can’t be reached https://www.amandagoodman.com took too long to respond.
Try:

Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_TIMED_OUT

I went into phpMyAdmin and changed the template and stylesheet to twentyfifteen, but I still can’t access /wp-admin. I deleted the theme via FTP.

Help?

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