upgraded, white screen

Hi

Just used your plugin for Theme. The Curator by The Molitor.
Activated the new version and now I only have a white screen. No sit at all.
http://history.museumofsurf.com/
This is only a catalogue for the main site of museumofsurf.com.
but I need it.
Thanks for any help

Rob

https://ww.wp.xz.cn/plugins/easy-theme-and-plugin-upgrades/