iframe not showing on frontend when using a CMB2 field

how do you assign the variable? use something like this?

$variable = esc_html( get_post_meta(get_the_ID(), 'example', true) );

if yes, try removing esc_html()

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