Plugin gives error during activation

Hello, i am using the free version but it shows error when i try to activate it

Fatal error: Uncaught Error: Class ‘VIWEC\INC\Compatible’ not found in /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/includes/init.php:139 Stack trace: #0 /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/includes/init.php(43): VIWEC\INC\Init->class_init() #1 /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/includes/init.php(54): VIWEC\INC\Init->__construct() #2 /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/includes/init.php(352): VIWEC\INC\Init::init() #3 /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/email-template-customizer-for-woo.php(75): require_once(‘/home/u49856779…’) #4 /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/email-template-customizer-for-wo in /home/u498567795/domains/cyprusbazaar.store/public_html/wp-content/plugins/email-template-customizer-for-woo/includes/init.php on line 139