I get below Warning when i enable wpa-seo-auto-linker plugin

I get below Warning when i enable wpa-seo-auto-linker plugin ,suggest me if any alternative

Warning : Cannot modify header information – headers already sent by (output started at /home/web1expert/public_html/wp-content/plugins/wpa-seo-auto-linker_bkp/wpa-seo-auto-linker.php:13) in /home/web1expert/public_html/wp-admin/admin-header.php on line 9

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