I have managed to place the search to the sidebar. You can remove it, or edit it in the wp-content/themes/Collias/sidebar.php line 4-6.
The backend is also working now. The problem was, that you had around 60000 records, and one of the settings broke the layout (because it was too big in html code), so I deactivated that in the search code, it should work fine.
I also configured the search for you, as I you have 60k records, for the best possible speed.
Let me know if you need anything!Best,
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