Great @lbell that you are looking into this!
Today I was receiving the “critical error” and basically blank page on my WordPress Website.
I checked Wordfence and saw the error above mentioned by @thewebsmiths .
Had to deactivate your plugin to see my website again.
Strange thing is, I then reactivated Pretty Google Calendar, and now it does seem to work fine again, all of a sudden… 🤷♂️
