Critical Error on Theme option page after installation

i have installed the latest theme version 5.2.1 with latest wp version 6.1.1 and php 8
i get critical error on theme option page
the debug mode is activated, tried deactivating plugins etc but no luck.
here is the log

Fatal error: Uncaught TypeError: aviaPostCssManagement::handler_wp_save_post(): Argument #2 ($post) must be of type WP_Post, null given, called in /home/desarrollomastalento/www/wp-includes/class-wp-hook.php on line 308 and defined in /home/desarrollomastalento/www/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/class-post-css-management.php:385 Stack trace: #0 /home/desarrollomastalento/www/wp-includes/class-wp-hook.php(308): aviaPostCssManagement->handler_wp_save_post(0, NULL, false) #1 /home/desarrollomastalento/www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(0, Array) #2 /home/desarrollomastalento/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /home/desarrollomastalento/www/wp-includes/post.php(4717): do_action(‘save_post’, 0, NULL, false) #4 /home/desarrollomastalento/www/wp-content/themes/enfold/framework/php/class-media.php(70): wp_insert_post(Array) #5 /home/desarrollomastalento/www/wp-content/themes/enfold/framework/php/class-htmlhelper.php(765): avia_media::get_custom_post(‘Logo’) #6 /home/desarrollomastalento/www/wp-content/themes/enfold/framework/php/class-htmlhelper.php(252): avia_htmlhelper->upload(Array) #7 /home/desarrollomastalento/www/wp-content/themes/enfold/framework/php/class-htmlhelper.php(137): avia_htmlhelper->render_single_element(Array) #8 /home/desarrollomastalento/www/wp-content/themes/enfold/framework/php/class-adminpages.php(291): avia_htmlhelper->create_container_based_on_slug(Array, ‘avia_active_con…’) #9 /home/desarrollomastalento/www/wp-includes/class-wp-hook.php(308): avia_adminpages->render_page(”) #10 /home/desarrollomastalento/www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(”, Array) #11 /home/desarrollomastalento/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #12 /home/desarrollomastalento/www/wp-admin/admin.php(259): do_action(‘toplevel_page_a…’) #13 {main} thrown in /home/desarrollomastalento/www/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/class-post-css-management.php on line 385