After downgrade magento 2.3.5-p1 to magento 2.3.4 getting error

Question

After downgrade magento 2.3.5-p1 to magento 2.3.4 getting error when setup upgrade command fire

An abstract factory could not create an instance of magentoframeworkappdeploymentconfig(alias: Magento\Framework\App\DeploymentConfig).

Answer 1

I'm sorry to say that Magento doesn't support to downgrade. However, if you still want to do it, you need to install Magento version 2.3.4, create a fresh site then migrate data from your old store to the new one.