3678197 - Error in phase KERNEL_EXE: No suitable IGS release found for kernel

During upgrade by SUM tool, below error happened in phase KERNEL_EXE:

• SAPupConsole.log

*Error*
Severe error(s) occurred in phase
PREP_INPUT_KERNEL/SUBMOD_KERNEL_SCAN_TOOLCHK_INP/SUBMOD_KERNEL_SCAN_TOOLCHK_NONSERIAL/KERNEL_EXE!

Last generated error message:
No suitable IGS release found for kernel '745_REL' in file
'<Driver>:\usr\sap\<SID>\SUM\abap\control\IGSCheck.xml'.

• KERNELINP.LOG

1 ETQ399 Executing action 'HANDLE_IGS'
1EETQ399 Last generated error message is: No suitable IGS release found for kernel '745_REL' in file
1EETQ399X'<Driver>:\usr\sap\<SID>\SUM\abap\control\IGSCheck.xml'.
1EETQ204 Upgrade phase "KERNEL_EXE" terminated with severe errors 

• CAR.LOG

EXECUTING <Driver>:\usr\sap\<SID>\SUM\abap\bin\SAPCAR.EXE -V -R <Driver>:\usr\sap\<SID>\SUM\abap\exe -xvf E:\SAPEXEDB_900-80000808.SAR
SAPCAR: processing archive E:\SAPEXEDB_900-80000808.SAR (version 2.01)

...............

SAPCAR: Error category    >LOGGABLE_WARNING<
SAPCAR: Validation reason >CRL missing. Download and use CRL from https://tcs.mysap.com/crl/crlbag.p7s
SAPCAR: Signature Subject >CN=CodeSigner010, OU=Code Signing, O=SAP Trust Community II, C=DE<
SAPCAR: Signature Issuer  >CN=SAP Code Signing CA, O=SAP Trust Community II, C=DE<
SAPCAR: Signature Type    >SAP software<
SAPCAR: 42 file(s) extracted

Upgrade tools for ABAP

KERNEL_EXE, No suitable IGS release found for kernel, IGSCheck.xml, KERNELINP.LOG, CAR.LOG, SAPCAR, >LOGGABLE_WARNING<, Validation reason >CRL missing. Download and use CRL from https://tcs.mysap.com/crl/crlbag.p7s, Signature Issuer , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem