“internal server error”

My website was working beautifully before I updated the Sydney toolbox to the latest version last night, when everything crashed and all I could see was this message:
“The page cannot be displayed because an internal server error has occurred.”

I spent hours on the phone with my domain/host server company trying to resolve this issue, they were able to disable all of my plugins (I updated several and at the time I wasn’t sure which one was causing the issue), and log back in. I was able to re-install and activate the Page Builder by SiteOrigin Plugin, and the SiteOrigin Widgets Bundle Plugin, both without issue. But when I activate the Sydney Plugin the crash happens again. What can I do?