Why can’t change the permalink of my page/post?

When you are in the page you want to update, you can modify the slug at the top above the editor:

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By default WordPress uses the Page title, but you can change the ‘slug’ to whatever you want.

You can also look at Settings > Permalinks for some more options.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)