Image explanation within Assistants doestn't work in the playground

Tried many times in days for image explanation with an assistant(gpt-4o assigned) in the playground, always got the error "Run failed Sorry, something went wrong. ", the uploaded image and prompt were shown in the thread chat context window. Tried using assistants api to upload the image and prompt, and processed the “run”, the same error. Does someone know what’s the issue? Thanks.