Thanks for the support...
I uploaded a theme update to Magento 2, and run all the commands needed (Please find them below), but I'm still getting "500 Internal Server Error error". And when I checked logs in "public_html/var/log/exception.log" I see the error
[2021-12-14 08:46:23] main.CRITICAL: Class Magento\Framework\App\Http\Interceptor does not exist {"exception":"[object] (ReflectionException(code: -1): Class Magento\\Framework\\App\\Http\\Interceptor does not exist at /home/.../public_html/vendor/magento/framework/Code/Reader/ClassReader.php:26)"} []
Commands I already run several times...
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy -f
chmod -R 0777 generated
find . -type f -exec chmod 644 {} ;
find . -type d -exec chmod 755 {} ;
find ./var -type d -exec chmod 777 {} ;
find ./pub/media -type d -exec chmod 777 {} ;
find ./pub/static -type d -exec chmod 777 {} ;
chmod 777 ./app/etc
chmod 644 ./app/etc/*.xml
rm -rf pub/static/*
rm -rf var/cache var/generation var/page_cache
find ./pub/media/catalog -type f -exec chmod 777 {} ;