토스 샌드박스 결제 창 호출 시 500에러 발생합니다!

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{
  "result": "ERROR",
  "data": null,
  "error": {
    "code": "COMMON_ERROR",
    "message": "처리 중 오류가 발생했습니다",
    "data": {
      "failUrl": "https://dev.payment.solusmate.com/payments/pay/toss/TW/confirm/BT202508220847001800?pg_id=4&pm_id=1&from_webapp=true&er=45.9279&version=1&code=COMMON_ERROR&message=%EC%B2%98%EB%A6%AC%20%EC%A4%91%20%EC%98%A4%EB%A5%98%EA%B0%80%20%EB%B0%9C%EC%83%9D%ED%96%88%EC%8A%B5%EB%8B%88%EB%8B%A4&orderId=BT202508220847001800"
    }
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{
  "result": "ERROR",
  "data": null,
  "error": {
    "code": "COMMON_ERROR",
    "message": "처리 중 오류가 발생했습니다",
    "data": {
      "failUrl": "https://dev.payment.solusmate.com/payments/pay/toss/TW/confirm/BT202508220847001800?pg_id=4&pm_id=1&from_webapp=true&er=45.9279&version=1&code=COMMON_ERROR&message=%EC%B2%98%EB%A6%AC%20%EC%A4%91%20%EC%98%A4%EB%A5%98%EA%B0%80%20%EB%B0%9C%EC%83%9D%ED%96%88%EC%8A%B5%EB%8B%88%EB%8B%A4&orderId=BT202508220847001800"
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}