“A post type mismatch has been detected” Error when updating custom post

I think that there is a problem with the theme. Updating it to the latest version will solve the issue. A number of users have also faced the same problem with a theme on Theme Forest. The developer has fixed it by releasing a new update.
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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)