Should a theme have it’s own tinymce address?

Based on the error text, it seems that the theme is trying to load a plugin for TinyMCE, not that TinyMCE is within the theme.

Example:
https://code.tutsplus.com/guide-to-creating-your-own-wordpress-editor-buttons–wp-30182t

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