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Where can I see the requirements for creating a password in Bitcion core?

In 2017 I created a wallet in Bitcoin core and protected it with a password. The password contains characters like “.,;”. When I decided to send my bitcoins the wallet wrote an error “invalid password”. Where can I see the specification/specification/clear requirements for the password to be created? I have a suspicion that the use of special characters caused problems with the wallet. Thanks in advance for the answers.