This is not a good idea to edit the plugin files but if you can not deactivate this plugin below is the fix.
Plugin code- line number 102- 108 ihaf.php
if ( empty( get_option( $this->plugin->db_welcome_dismissed_key ) ) ) {
if ( ! ( $pagenow == 'options-general.php' && isset( $_GET['page'] ) && $_GET['page'] == 'insert-headers-and-footers' ) ) {
$setting_page = admin_url( 'options-general.php?page=' . $this->plugin->name );
// load the notices view
include_once( WP_PLUGIN_DIR . '/' . $this->plugin->name . '/views/dashboard-notices.php' );
}
}
change to –
$welcome_key = get_option( $this->plugin->db_welcome_dismissed_key );
if ( empty( $welcome_key ) ) {
if ( ! ( $pagenow == 'options-general.php' && isset( $_GET['page'] ) && $_GET['page'] == 'insert-headers-and-footers' ) ) {
$setting_page = admin_url( 'options-general.php?page=' . $this->plugin->name );
// load the notices view
include_once( WP_PLUGIN_DIR . '/' . $this->plugin->name . '/views/dashboard-notices.php' );
}
}