Why am I receiving error message 'Close Only' when attempting to enter opening positions?

SEND TICKET TO CLIENT SERVICES

Your account may have been placed into "Closing Only" mode. Please contact the IBKR Trade Desk for additional details:

  1. Select Trade Issues as the ticket category followed by Order Status and type "Closing Only" as the subject
  2. Provide the following information in the ticket body:
    1. Account
    2. Order date and time
    3. Product type (e.g. Stock, ETF, Future, Option, etc.)
    4. Product ticker symbol (e.g. AAPL)
    5. Exact order rejection message
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Why is my order being rejected with a LIQONLY (liquidation only) mode message, and how can I resolve this issue?
TWS message: At the moment, orders for this contract are only accepted if they are close or reduce open positions. Please contact Client Services for assistance
I am getting an error when clicking on the JASDEC form.