Demo template not installed, Required plugin not installed properly

Fatal error: Uncaught Error: Call to undefined method Kuteshop_Welcome::demos() in /home/cgafri5/public_html/marketplace.cgafrica.com/wp-content/plugins/kuteshop-toolkit/includes/classes/dashboard.php:334 Stack trace: #0 /home/cgafri5/public_html/marketplace.cgafrica.com/wp-includes/class-wp-hook.php(288): Kuteshop_Welcome->welcome('') #1 /home/cgafri5/public_html/marketplace.cgafrica.com/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters('', Array) #2 /home/cgafri5/public_html/marketplace.cgafrica.com/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /home/cgafri5/public_html/marketplace.cgafrica.com/wp-admin/admin.php(254): do_action('toplevel_page_k...') #4 {main} thrown in /home/cgafri5/public_html/marketplace.cgafrica.com/wp-content/plugins/kuteshop-toolkit/includes/classes/dashboard.php on line 334
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REQUIRED PLUGIN ERROR
I got this error for all required plugin Installation

Installing and Activating Plugin AJAX Search for WooCommerce (1/2)
Warning: sprintf(): Too few arguments in /home/cgafri5/public_html/marketplace.cgafrica.com/wp-admin/includes/class-bulk-upgrader-skin.php on line 152
Show details.

Downloading installation package from https://downloads.wordpress.org/plugin/ajax-search-for-woocommerce.1.6.0.zip…
Unpacking the package…
Installing the plugin…
Plugin installed successfully.
Plugin activated successfully.
Installing and Activating Plugin Ovic: Responsive WPBakery (2/2)
Warning: sprintf(): Too few arguments in /home/cgafri5/public_html/marketplace.cgafrica.com/wp-admin/includes/class-bulk-upgrader-skin.php on line 152
Show details.

Downloading installation package from https://downloads.wordpress.org/plugin/ovic-vc-addon.zip…
Unpacking the package…
Installing the plugin…
Plugin installed successfully.
Plugin activated successfully.
All installations and activations have been completed.