configuring TN with IS using Oracle

There was this error when configuring TN using Oracle:

There was a database error fetching the model version information from your database.
(0) java.lang.IllegalStateException: The main connection to the datastore has not been initialized; check your WmTN packages startup service.
(1) java.lang.IllegalStateException: The main connection to the datastore has not been initialized; check your WmTN packages startup service.

Could someone help me configuring TN using oracle.