Need help in resolving errors for Customers upload via 19 sheets FBDI

Summary:

I am facing few warnings in the subprocess of Load Interface file for Import while trying to load customers via 19 sheets FBDI to the interface table.

After looking at the log files I see the below errors:

Content (required):

Rejected - Error on table HZ_IMP_PARTYSITES_T, column START_DATE_ACTIVE.

ORA-01843: not a valid month

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Rejected - Error on table HZ_IMP_PARTYSITES_T, column START_DATE_ACTIVE.

ORA-01830: date format picture ends before converting entire input string

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Rejected - Error on table HZ_IMP_PARTIES_T.

ORA-01400: cannot insert NULL into (???)

Version (include the version you are using, if applicable): 23B