Applying for a Vacancy in iRecruitment Errs 'Message not found. Application OTA, Message Name...' (Doc ID 872936.1)

Symptoms

When applying to a vacancy with an assessment, the following error occurs:

ERROR
'Message not found. Application: OTA, Message Name:
Application: FND, Message Name: FND_GENERIC_MESSAGE. Tokens: MESSAGE = java.sql.SQLException:
Initialization failed;

STEPS
The issue can be reproduced at will with the following steps:
1) Login as an iRecruitment External Candidate
2) Search for a vacancy with an assessment
3) Apply for the vacancy
4) After entering the initial details, click on next to go to the assessment section
5) Error

Cause

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