ERROR PHP after installed the BeTheme and activated

Hello,

I have installed the BeTheme and activate, But now I get this bellow rerror;

I can't access anymore to wordpress: https://winonaprobio.com/wp-login.php

I get this ERROR;

Warning: Use of undefined constant ONELIFE_NAME - assumed 'ONELIFE_NAME' (this will throw an Error in a future version of PHP) in /home/customer/www/winonaprobio.com/public_html/wp-content/plugins/designthemes-core-features/widgets/widget-twitter.php on line 6

Fatal error: Uncaught Error: Call to undefined function onelife_option() in /home/customer/www/winonaprobio.com/public_html/wp-content/plugins/designthemes-core-features/privacy/register-privacy.php:10 Stack trace: #0 /home/customer/www/winonaprobio.com/public_html/wp-content/plugins/designthemes-core-features/privacy/register-privacy.php(219): onelife_privacy_class->__construct() #1 /home/customer/www/winonaprobio.com/public_html/wp-includes/class-wp-hook.php(308): onelife_privacy_helper('') #2 /home/customer/www/winonaprobio.com/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(false, Array) #3 /home/customer/www/winonaprobio.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /home/customer/www/winonaprobio.com/public_html/wp-settings.php(617): do_action('init') #5 /home/customer/www/winonaprobio.com/public_html/wp-config.php(101): require_once('/home/customer/...') #6 /home/customer/www/winonaprobio.com/public_html/wp-load.php(50): require_once('/home/customer/...') #7 /home/ in /home/customer/www/winonaprobio.com/public_html/wp-content/plugins/designthemes-core-features/privacy/register-privacy.php on line 10

Please advise,

Thank you.