they replied to me! I think it will be fixed soon.
“Hello,
Thank you for reaching out to OpenAI Support.
We understand how disruptive it can be to encounter the “conversation_tree_corrupt” error while working within the Projects feature, especially when it causes conversations to disappear entirely. It’s completely valid to expect stability during long-running sessions, and we’re here to assist.
We’re really sorry for the disruption. We’re currently experiencing higher-than-usual demand related to the GPT-5 launch, which is impacting availability and performance for some users. Our engineering team is actively working to increase capacity and restore normal service.
You may notice slower responses, intermittent errors, or temporary unavailability of certain models during this time. We’ll post updates on our status page as we work on the fix.
Thank you for your patience while we work to resolve this.
Best,
Marvin Kyser
OpenAI Support”