After Activating, its showing license warning!...I have figured it out just go to public_html/wp-content/plugins/betterdocs-pro/admin/includes/licensing/class-betterdocs-licensing.php
From line 82 to 99 delete or put the following code in comment
if ( ( $status === false || $status !== 'valid' ) && $status !== 'expired' ) {
$msg = __( 'Please %1$sactivate your license%2$s key to enable updates for %3$s.', $this->text_domain );
$msg = sprintf( $msg, '<a href="' . admin_url( 'admin.php?page=' . $this->get_settings_page_slug() ) . '#go_license_tab">', '</a>', '<strong>' . $this->product_name . '</strong>' );
?>
<div class="notice notice-error">
<p><?php echo $msg; ?></p>
</div>
<?php
}
if ( $status === 'expired' ) {
$msg = __( 'Your license has been expired. Please %1$srenew your license%2$s key to enable updates for %3$s.', $this->text_domain );
$msg = sprintf( $msg, '<a rel="nofollow" href="#">', '</a>', '<strong>' . $this->product_name . '</strong>' );
?>
<div class="notice notice-error">
<p><?php echo $msg; ?></p>
</div>
<?php
}
