The error indeed seems to occur at that step in the UI; however, even after turning off web search, the issue persists (right after the word "David" appears).

Alternatively, you can try the legacy GPT-4 model, which lacks web search capabilities—it also produces the same error.

This suggests the issue may not be related to the search functionality or the model itself, but rather to the "moderation layer" in the ChatGPT web product.