s9 and s9 plus sprint unable to unlock

is there something wrong? i used to be able to unlock this phones all the time but now i keep getting error.
i am going to flash combo and see if it helps but if i am doing something wront chimera team plz help me


Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G960U
Sales Code: SPR
Country Code: USA
Timezone: America/Los_Angeles
Android Version: 9 [PPR1.180610.011] [SDK 28]
Build Date: Mon Mar 18 15:16:38 KST 2019
PDA Version: G960USQU4CSC7 [march 2019, rev7]
Phone Version: G960USQU4CSC7 [march 2019, rev7]
CSC Version: G960UOYN4CSC7 [march 2019, rev7]
Product Code: SPR
HIDSw Version: G960USQU4CSC7/G960UOYN4CSC7/G960USQU4CSC7/G960USQU4CSC7
Board Platform: SDM845
Modem Platform: SDM845
Serial Number: R58K44T0S7D
Imei: 356417092489471
Unique Number: 988C0934555039505733
Connections: AT,MTP
Battery Status: 3.91V (45%)
Network Type: CDMA
SIM Status: CARD_IO_ERROR
Multisim Config: SS
Knox Version: v30
Warranty Bit: 0
Security Patch: 2019-03-01
Data Encryption State: encrypted
Unlocking...
Checking modem.
Unable to unlock.
Finished at local time: [04.14.19 09:13:20]
WorkID: 57100828