Post stopped due to "Poster: ORA-12096: error in materialized view log on.." (4297210)

The following errors are observed in the target event_log when Post is stopped due to ORA-12096:

Error    2019-07-18 17:51:42.659536 121621 3722688256 s:5 Poster: que/seq = 5/ 28353 seqno/offset = 210/392608552 Unexpected Oracle error: ORA-12096: error in materialized view log on "TABLE_OWNER"."TABLE_NAME" ORA-01843: not a valid month ORA-06512: at "TRIGGER_OWNER”.”TRIGGER_NAME", line 325 ORA-04088: error during execution of trigger “TRIGGER_OWNER”.”TRIGGER_NAME”  (object name: "TABLE_OWNER"."TABLE_NAME")  (posting from o.SOURCESID, queue QUEUE_NAME, to o.TARGETSID) [module opo]

Info     2019-07-18 17:51:43.612906 101181 383715168 Poster exited with code=1, pid = 121621  (posting from o.SOURCESID, queue QUEUE_NAME, to o.TARGETSID)