I can not install the demo data

Hi, I can’t install Demos when I go to the kuteshop section and select the dashboard. The message says that The site is experiencing technical difficulties. Please check your site admin email inbox for instructions. Not sure what the problem is. But now cannot use And I need a ready-made theme immediately Ask for help and advice as well.

I didn’t get the message. ’’WordPress has detected a malfunction in your Kuteshop Toolkit plugin.”

“Error of type E_ERROR occurs on line 242 of file /home/.../domains/.../public_html/wp-content/plugins/kuteshop-toolkit/includes/classes/dashboard.php. Error message: Uncaught Error: Call to undefined method Kuteshop_Welcome :: demos ()