After Installing Plugin "Kopa Forceful Toolkit" Showing Error

I installed this theme and it’s asking to install Kopa Forceful Toolkit plugin. I installed this plugin but it’s showing error.
Fatal error: Cannot redeclare kopa_awesome_weather_logic() (previously declared in /home/ouradda/public_html/wp-content/themes/forceful-lite/library/includes/widgets.php:1716) in /home/ouradda/public_html/wp-content/plugins/kopa-forceful-toolkit/kopa-widgets.php on line 290

How to solve it? Weather also not working.
This is the domain: https://www.ouradda.net/