My site no longer works.
Here's what page reads:
The website encountered an error while retrieving http://www.MYSITE.com/wp-admin/update-core.php?action=do-plugin-upgrade. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this webpage later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.