Fix typo in the error message rendering

Vasilii Iakliushinrequested to merge
fix_typo_in_error_message into master

What does this MR do and why?

Problem

Because of the typo, the endpoint doesn't render the error message.

Solution

Fix typo and add a test to verify the error message.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

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