Código de erro: 1248 Toda tabela derivada deve ter seu próprio alias no MySQL

eu tenho problema aqui, quando estou tentando selecionar com a consulta abaixo, recebi uma mensagem de erro

Código de erro: 1248 Cada tabela derivada deve ter seu próprio alias

SELECT B.BRANCH_CODE, B.BRANCH_NAME, C.COMPANY_CODE, C.NAME, TSK.DATE_CREATE,
  CASE TB.BULK_TYPE
    WHEN 1 THEN 'Bulk Transfer'
    WHEN 2 THEN 'Bulk Payment'
    ELSE 'Payroll'
  END AS TRX_METHOD_E, 
  CASE TB.BULK_TYPE
    WHEN 1 THEN 'Bulk Transfer'
    WHEN 2 THEN 'Bulk Pembayaran Tagihan'
    ELSE 'Pembayaran Gaji'
  END AS TRX_METHOD_I,
  TB.TOTAL_RECORD,
  TB.ACCOUNT_NO,
  TSK.TRX_TOTAL,
  TC.TOTAL_CHARGE,
  DATE(TSK.DATE_TRX) AS DATE_TRX,
  TB.REF_ID,
  CASE
    WHEN TSK.TRX_COUNT_SUCCESS = TSK.TRX_COUNT_ALL THEN 'All Success'
    WHEN TSK.TRX_COUNT_FAIL = TSK.TRX_COUNT_ALL THEN 'All Failed'
    WHEN TSK.TRX_COUNT_SUCCESS > 0 AND TSK.TRX_COUNT_FAIL > 0 THEN 'Partial Success (' || TSK.TRX_COUNT_SUCCESS || '/' || TSK.TRX_COUNT_ALL || ')'
    ELSE 'Pending Execution'
  END AS TRX_STATUS_E,
  CASE
    WHEN TSK.TRX_COUNT_SUCCESS = TSK.TRX_COUNT_ALL THEN 'Berhasil Semua'
    WHEN TSK.TRX_COUNT_FAIL = TSK.TRX_COUNT_ALL THEN 'Gagal Semua'
    WHEN TSK.TRX_COUNT_SUCCESS > 0 AND TSK.TRX_COUNT_FAIL > 0 THEN 'Berhasil Sebagian (' || TSK.TRX_COUNT_SUCCESS || '/' || TSK.TRX_COUNT_ALL || ')'
    ELSE 'Tunggu Eksekusi'
  END AS TRX_STATUS_I  
FROM CB_TASK_BULKS TB
  JOIN CB_TASKS TSK ON TSK.REF_ID = TB.REF_ID
  JOIN CB_COMPANIES C ON C.COMPANY_ID = TSK.COMPANY_ID
  JOIN CB_BRANCHES B ON B.BRANCH_CODE = C.BRANCH_CODE,
(
  SELECT REF_ID, SUM(CHARGE) AS TOTAL_CHARGE
  FROM
  (
    SELECT XTB.REF_ID, SUM(CHARGE) AS CHARGE
    FROM CB_TRANSFERS XT
    JOIN CB_TASK_BULK_DETAILS XTBD ON XTBD.BULK_DETAIL_ID = XT.BULK_DETAIL_ID
    JOIN CB_TASK_BULKS XTB ON XTB.REF_ID = XTBD.REF_ID
    GROUP BY XTB.REF_ID

    UNION

    SELECT XTB2.REF_ID, SUM(CHARGE) AS CHARGE
    FROM CB_TRANSFERS_DOM XTD
    JOIN CB_TASK_BULK_DETAILS XTBD2 ON XTBD2.BULK_DETAIL_ID = XTD.BULK_DETAIL_ID
    JOIN CB_TASK_BULKS XTB2 ON XTB2.REF_ID = XTBD.REF_ID
    GROUP BY XTB.REF_ID

    UNION

    SELECT XTB3.REF_ID, SUM(CHARGE) AS CHARGE
    FROM CB_PAYMENTS XP
    JOIN CB_TASK_BULK_DETAILS XTBD3 ON XTBD3.BULK_DETAIL_ID = XP.BULK_DETAIL_ID
    JOIN CB_TASK_BULKS XTB3 ON XTB3.REF_ID = XTBD.REF_ID
    GROUP BY XTB.REF_ID
  )
  GROUP BY REF_ID
) TC
WHERE TC.REF_ID = TSK.REF_ID
AND (TSK.TRX_COUNT_SUCCESS > 0 OR TSK.TRX_COUNT_FAIL > 0);

alguém pode me ajudar a encontrar meu problema aqui, acho que dei todas as tabelas com seu próprio "nome" como TB para CB_BULKS_DATA (exemplo)