I’m having the exact same issue.
After a Prompt in GPT-4 with the DALL·E Beta Plugin I get:
I apologize for the inconvenience, it seems there’s a technical issue with the image generation service. I’m unable to create the image at the moment. However, I can help answer any other questions you might have or provide information on a different topic.
This means the plugin author submitted a new version and it is currently pending approval (may take several days). So hopefully they’re fixing the issues you’re seeing.