ORA-12012: error on auto execute of job

HiAll,

We are getting a below error on the event based jobs. We checked in Trace file and below is the information from trace file.

Can you please let us know why are we getting this error?

*** 2019-02-23 00:00:21.161
*** SESSION ID:(263.7918) 2019-02-23 00:00:21.161
*** CLIENT ID:() 2019-02-23 00:00:21.161
*** SERVICE NAME:(SYS$USERS) 2019-02-23 00:00:21.161
*** MODULE NAME:(DBMS_SCHEDULER) 2019-02-23 00:00:21.161
*** CLIENT DRIVER:() 2019-02-23 00:00:21.161
*** ACTION NAME:(EVJ_BDT_POSTPROC_BATCH) 2019-02-23 00:00:21.161

ORA-12012: error on auto execute of job "STX"."EVJ_BDT_POSTPROC_BATCH"."SCHED$_E
VTPARINST_143"
ORA-01024: invalid datatype in OCI call
ORA-21560: argument 7 is null, invalid, or out of range