Error

  • Hi,
    After activating the plugin gives an error: Deprecated: Non-static method ms_Main :: show_admin_notice () should not be statically called in /web/htdocs/www.xxxxxx.biz/home/wp-includes/class-wp-hook. Php on line 298
    The plugin during activation generated 257 unexpected output characters. If you notice a “headers already sent” message, feed problems, or other types of issues, try disabling or removing the plugin.

    How can I fix it?
    Thank you

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