Update to 2.9 broke update and plugin pages

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Hi, i have the same problem. Plugin-Site is broken.

URL is https://lioneldavoust.com
Currently Jetpack has been removed and the corresponding options purged in wp-options table, to no avail.

I fixed issue by adding jetpack to enabled plugins list in wp-options through database.

How do you manage that?

Possibly easier to disable all plugins via the database and then reactivate them via the dashboard (which should be working again).

Open database in phpMyAdmin
Search for the option name active_plugins
The value will look something like:

a:6:{
i:0;s:35:"backupwordpress/backupwordpress.php";
i:1;s:55:"all-in-one-event-calendar/all-in-one-event-calendar.php";
i:2;s:45:"google-analytics-dashboard-for-wp/ga_dash.php";
i:3;s:19:"jetpack/jetpack.php\";
i:4;s:41:"wordpress-importer/wordpress-importer.php";
i:5;s:24:"wordpress-seo/wp-seo.php";}

Copy and paste the value text to Notepad or similar on your local machine.
Delete the entire value, which will deactivate all plugins
Go pack to dashboard and refresh plugins page, they should all be visible, deactivated
Reactivate, maybe one at a time, and check everything works ok.

THANK YOU! I managed to reinstall Jetpack then, and reactivate everything, and it works. Whew!