DB Prefix Change Issues
I started getting a 502 when trying to access /wp-admin/users.php. Through a bunch of research I found the issue to be with Admin Columns.
It appears that ac_preferences are referencing the default wordpress wp_users in the metakey. This is causing a conflict because our DB prefix is changed to something else unique. Once I delete the meta key/meta value pair from my user’s user_meta then the page loaded fine. This was the culprit:
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