Is this specific to ChatGPT Web Interface, not the API?
If so then please change the categtory to ChatGPT. 
Also did you read
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it notes
- Check the server status page https://status.openai.com/
which notes
Mar 20, 2023
ChatGPT Web Interface Incident
Resolved - We’ve fully restored ChatGPT service to all users. We’re continuing to work to restore past conversation history to users.
Mar 20, 19:54 PDT