Serialization of 'Magento\Framework\View\Layout\Element' is not allowed

It seems like a bug in Magento 2.1. EAV Attribute Cache mechanism is removed in Magento 2.2.0. Temporary solution will be disabling cache from backend or else we need to fix the module which is causing the issue which is not recommended way.

Link source: https://github.com/magento/magento2/issues/5339

Magento 2.2 commit link where the EAV cache mechanism is removed

https://github.com/magento/magento2/commit/3ae7c1909daad96d5a0ad6ab7048455448ba7480