I resolved adding these lines to the functions.php:
function ocdi_change_time_of_single_ajax_call() {
return 10;
}
add_filter( ‘ocdi/time_for_one_ajax_call’, ‘ocdi_change_time_of_single_ajax_call’ );
add_filter( ‘ocdi/regenerate_thumbnails_in_content_import’, ‘__return_false’ );
Please recommend the same thing if someone has my problem.
Thank you anyway for trying.