WordPress Search Page not working – Conflict?

Hi,
When I updated to worpress 3.9, the wordpress search pages at the admin area is not working and I found out that this plugin is the one causing it. I check on the URI after I input a search query and here it is:
http://[mysite.com]/wp-admin/edit.php?s=areas+of+practice&post_status=all&post_type=page&_wpnonce=e2249cba21&_wp_http_referer=%2Fwp-admin%2Fedit.php%3Fpost_type%3Dpage&action=-1&m=0&seo_filter=&paged=1&simplepagesidebars_page_sidebar_update_nonce=f3a2be15bf&simplepagesidebars_page_sidebar_update_nonce=3d8ab25e65&simplepagesidebars_page_sidebar_update_nonce=9eaadcce56&simplepagesidebars_page_sidebar_update_nonce=5349add3fa&simplepagesidebars_page_sidebar_update_nonce=1b8c8bf0e2&simplepagesidebars_page_sidebar_update_nonce=71dedc16ac&simplepagesidebars_page_sidebar_update_nonce=28e0be3f9c&simplepagesidebars_page_sidebar_update_nonce=b893a96c08&simplepagesidebars_page_sidebar_update_nonce=c977bbf071&simplepagesidebars_page_sidebar_update_nonce=d4426550fe&simplepagesidebars_page_sidebar_update_nonce=0b37062887&simplepagesidebars_page_sidebar_update_nonce=d3c336136a&simplepagesidebars_page_sidebar_update_nonce=7369c02c56&simplepagesidebars_page_sidebar_update_nonce=f818e77c06&simplepagesidebars_page_sidebar_update_nonce=c7dda7380f&simplepagesidebars_page_sidebar_update_nonce=fd2031d696&simplepagesidebars_page_sidebar_update_nonce=9ad4f4cfe7&simplepagesidebars_page_sidebar_update_nonce=27ccbdfe3c&simplepagesidebars_page_sidebar_update_nonce=c499a3ead1&simplepagesidebars_page_sidebar_update_nonce=7b967b0d5d&simplepagesidebars_page_sidebar_update_nonce=3cae09c72a&simplepagesidebars_page_sidebar_update_nonce=9dcd0ab109&simplepagesidebars_page_sidebar_update_nonce=10e810b7fa&simplepagesidebars_page_sidebar_update_nonce=2818986542&simplepagesidebars_page_sidebar_update_nonce=2fb9e86d19&simplepagesidebars_page_sidebar_update_nonce=0829047c5f&simplepagesidebars_page_sidebar_update_nonce=684b18a500&simplepagesidebars_page_sidebar_update_nonce=c9afdebff3&simplepagesidebars_page_sidebar_update_nonce=3500448905&simplepagesidebars_page_sidebar_update_nonce=ae39def4bb&simplepagesidebars_page_sidebar_update_nonce=3193409dd5&simplepagesidebars_page_sidebar_update_nonce=5ee1847220&simplepagesidebars_page_sidebar_update_nonce=19c48ef066&simplepagesidebars_page_sidebar_update_nonce=ff18124e7b&simplepagesidebars_page_sidebar_update_nonce=43890ba21a&simplepagesidebars_page_sidebar_update_nonce=50c5929c4b&simplepagesidebars_page_sidebar_update_nonce=7bd8692fc7&simplepagesidebars_page_sidebar_update_nonce=5afef17398&simplepagesidebars_page_sidebar_update_nonce=9856f484ad&simplepagesidebars_page_sidebar_update_nonce=17a4258097&simplepagesidebars_page_sidebar_update_nonce=98913fe78f&simplepagesidebars_page_sidebar_update_nonce=f5c2a975ef&simplepagesidebars_page_sidebar_update_nonce=27baa52276&simplepagesidebars_page_sidebar_update_nonce=45db7e70cf&simplepagesidebars_page_sidebar_update_nonce=089b6da59d&simplepagesidebars_page_sidebar_update_nonce=a2954f6c5e&simplepagesidebars_page_sidebar_update_nonce=068a6452eb&simplepagesidebars_page_sidebar_update_nonce=b02aee85e7&simplepagesidebars_page_sidebar_update_nonce=5d32e0e697&simplepagesidebars_page_sidebar_update_nonce=98a72c8591&simplepagesidebars_page_sidebar_update_nonce=d6a2973ee0&simplepagesidebars_page_sidebar_update_nonce=9802f1b049&simplepagesidebars_page_sidebar_update_nonce=56d7bb086a&simplepagesidebars_page_sidebar_update_nonce=c348c2ed44&simplepagesidebars_page_sidebar_update_nonce=b7602575a5&simplepagesidebars_page_sidebar_update_nonce=12b1a48e78&simplepagesidebars_page_sidebar_update_nonce=626174720e&simplepagesidebars_page_sidebar_update_nonce=d21ec0d517&simplepagesidebars_page_sidebar_update_nonce=e0b09c2257&simplepagesidebars_page_sidebar_update_nonce=4dc406b161&simplepagesidebars_page_sidebar_update_nonce=5f1c50647e&simplepagesidebars_page_sidebar_update_nonce=519ce650fe&simplepagesidebars_page_sidebar_update_nonce=eb978f28c7&simplepagesidebars_page_sidebar_update_nonce=40f15651af&simplepagesidebars_page_sidebar_update_nonce=bbcb7a83ab&simplepagesidebars_page_sidebar_update_nonce=a548597e39&simplepagesidebars_page_sidebar_update_nonce=dc29f83c56&simplepagesidebars_page_sidebar_update_nonce=a1e758d2c3&simplepagesidebars_page_sidebar_update_nonce=708a81e8bb&simplepagesidebars_page_sidebar_update_nonce=d569c0b0da&simplepagesidebars_page_sidebar_update_nonce=9515620ede&simplepagesidebars_page_sidebar_update_nonce=7bdaf4805d&simplepagesidebars_page_sidebar_update_nonce=20f91ea8f6&simplepagesidebars_page_sidebar_update_nonce=3a5aecf554&simplepagesidebars_page_sidebar_update_nonce=650bfdace6&simplepagesidebars_page_sidebar_update_nonce=bd8e337817&simplepagesidebars_page_sidebar_update_nonce=29b5a79ee0&simplepagesidebars_page_sidebar_update_nonce=a19c646d03&simplepagesidebars_page_sidebar_update_nonce=342c895f89&simplepagesidebars_page_sidebar_update_nonce=6ad3ca96d5&simplepagesidebars_page_sidebar_update_nonce=a513f015a3&simplepagesidebars_page_sidebar_update_nonce=73e394d1a2&simplepagesidebars_page_sidebar_update_nonce=cec44928ce&simplepagesidebars_page_sidebar_update_nonce=66a6619876&simplepagesidebars_page_sidebar_update_nonce=50996f6d20&simplepagesidebars_page_sidebar_update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Any ideas what is going on?
Thanks!

https://wordpress.org/plugins/simple-page-sidebars/