I got the very same issue, no matter what I tried. I am trying to share a chat conversation, using the share option on the top right. I created conversations using 3.5, with my custom instructions switched on and off. However, the person I am sharing the share link with only gets errors, typically the "Oops" error, and the "Try again" button does not do anything. I only need the other person to view the chat, not continue the conversation. I have cleared cache and cookies, have tried different browsers, have tried incognito modes - always the same error. What is the problem?