What are Claude HTTP 500 and 529 error messages, and which regions are affected by Anthropic outage? Here's affected services, Anthropic statement

What are Claude HTTP 500 and 529 error messages, and which regions are affected by Anthropic outage? Claude down reports surged as users in India, Europe, and Africa faced login failures and site errors. Anthropic confirmed elevated errors on claude.ai and said investigation is ongoing without an ETA.