I found 100% issue fixed. visit my YT video for soultion-
https://youtu.be/OulOtkMICdw.
Getting following issue when upgrade caldera form from Version 1.8.8 to 1.8.9.
Issue: PHP Fatal error occurred: Cannot use calderawp\calderaforms\pro\api\local\settings as settings because the name is already in use in /var/www/html/xxxx/wp-content/plugins/caldera-forms/includes/cf-pro-client/classes/hooks.php on line 10.
PHP version- PHP 5.6.40 (cli) (built: Dec 17 2019 17:19:45), OS- CentOS 6