LinkedIn Password Length Confusion

I changed my password on LinkedIn to a 20 character password. There was no indication how long the password should be and no error message after I changed it, indicating that my password was accepted. But as I tried to login with the new password I received the following error message: “The email address or password you provided does not match our records.” So I used the “Forgot Password” feature to reset the password to the new password again which did not work either. This made me wonder if my password length of 20 characters is valid. Again, I did not find any restrictions for password length and my password was accepted, meaning I did not get an error message after I changed it to a 20 character password.
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