OpenHands encountered an error: The request to the Slack API failed. (url: <https://slack.com/api/chat.postMessage)
The> server responded with: {'ok': False, 'error': 'invalid_blocks', 'errors': ['no more than 50 items allowed [json-pointer:/blocks]'], 'response_metadata': {'messages': ['[ERROR] no more than 50 items allowed [json-pointer:/blocks]']}}See the conversation for more information.