Rewrite these error messages

Your interface says "An error occurred" and support is fielding the fallout.

Rewrite these error messages. Each must say what failed in the user's terms, whether their work is safe, and one thing they can do right now. No blame, no system internals, no error code unless support will genuinely ask for it. Flag any error that should be designed away rather than reworded.

Errors:

Interface copy. Every word inside the product: button labels, error messages, empty states and what things are called.