GPT not found or insufficient permissions

Today I got the error on chatgpt so please help me out how to resolve

GPT not found or insufficient permissions. Please verify the GPT exists, and ensure that your account has the necessary permissions and that there are no workplace restrictions preventing access.

I’ve been using it for a long time, but I’m not able to continue with the conversations I’ve already been having. If someone can help us please :wink:

I also got the same error