Once per day I got my production server down with this error
Notice: Undefined index ....vendor/magento/module-developer/Model/View/Page/Config/RendererFactory.php on line 64
I've checked config for
dev/front_end_development_workflow/type and it exists in
database also and as default config in
Magento version 2.1.7
This error fixes with clearing cache but it's not a solution to do every time. Does anybody faced with this issue?