"Reconciliation date XXXX is in a locked period"

Issue
In Bank Services, after selecting a transaction to be reconciled, the following error occurs:
"Invalid input. Reconciliation date XXXX is in a locked period for Bank Services in Common Services' Fiscal Calendar."
Note: XXXX refers to the Reconciliation Date
The above message appears even after confirming in Common Services, Fiscal Calendar,
the period in question is not locked.