API Stopped Working

The request is not authorized because credentials are missing or invalid.

Api header name and value

Does Language Detect count towards the quota?

The multi language doesn't work like the doc said

Bad Gateway 502

The API is unreachable, please contact the API provider","info":"Your Client (working) ---> Gateway (working) ---> API (not working)

502 bad gateway

How can I make it faster?

maximum text generated to translate length?