Airi pro - plugin error

After installing plugin and activating it - all pages that I created before (on free version) go blank and I also received message from Wordpress that plugin crashes pages.:

Error Details

An error of type E_COMPILE_ERROR was caused in line 0 of the file /home/eurofrut/public_html/newpage/wp-content/plugins/airi-pro/blocks/block-portfolio.php. Error message: Cannot redeclare class Elementor\aThemes_Portfolio

When plugin is deactivated - all goes back to normal - starts working again

Please help
igor

ok, I noticed that when disabled Sydney toolbox plugin and activated Ari pro - all seems to be working -