Site Died After Jetpack Update

I updated Jetpack this morning and everything died once again.

I cannot do much of anything on WordPress now – everytime I navigate to a different page I get an Internal Error message, and nearly everytime I try to upgrade a plugin the whole thing crashes completely. I really mean completely. Nothing will work until I go into the files and delete the last thing updated, and I cannot reinstall or it happens again. This is really driving me crazy – I (like everybody else) need my site and it won’t run.

This is affecting both my sites, but mostly the main site:

Main site: https://www.rabidhorse.com
Secondary site: https://www.scififangirl.rabidhorse.com

I’ve moved the whole Jetpack folder to my “disabled plugins” folder, and now I can access the site, but not without still getting every other page marked 500 internal error.

Thank you for any help! ??