When I try to check my 'field updates' (in automation/workflow rules), I get the error shown below: 

CRM_ERROR_PAGE_500::::EXCEPTION

Could you tell me how can I solve it? Is this a bug or is there any way to avoid it and check my configured 'field updates'?

In addition, when I go to blueprints and I edit one of them, I'm trying to configure as an 'after' rule to update a field. If I try to associate an existing one, nothing happens. It's supposed that I should see a list with every field updates already created. It was workig fine, but yesterday it stops working.

Kind regards,

Macarena