[Решено] after translating i get this message = Validation failed. 1 field requires attention

Background of the issue:
I am trying to translate a page and after pressing update, I encounter an issue. The page where the issue can be seen is скрытая ссылка. I expected to see the property translated.

Symptoms:
After translating and pressing update, I get two red bars on the page with the message: 'Validation failed. 1 field requires attention'.

Questions:
Why am I seeing a validation error after translating and updating the page?
What does 'Validation failed. 1 field requires attention' mean in this context?