Excellent.
Thank you SO much for helping a non-savvy user. Faith in humanity remains intact.
cheers.
Thank you WPyogi! I can now access my site again.
I tried to reinstall Jetpack via the “plugins” section on the WP dashboard, but it led to the same error as before.
If I want to use the Jetpack features again, is there a way for me to figure out what is causing Jetpack to fail like this?