System: Magento 2.1
Everithyng was running fine 5 minuts ago. I had 3 Products in my Catalog (all using the same Attribute Set). Then I simply deleted 2 Attributes from my (currently in use) Attribute Set via Admin Panel. Then via Magento CLI I did
indexer:reindex -> then Deleted Browser Cache.
In Browser I reloaded my webshop (everithyng looks fine). When I click on a Product -> Product Page
https://myshop.de/product1-300x200.html loads and gives
HTTP ERROR 500.
Everything else on my Webshop works fine, just all my Product Pages give me the same
HTTP ERROR 500 error.
For the unexpected error (e.g 500), we should enable error reporting on the bootstrap:
ini_set('display_errors', -1) // Should enable error reporting with -1 value.
In your case, we need to check the places where you call your your custom attributes which has been deleted.