Editor icons not displaying right

Hello!

I’ve included a front-end editor on my website but when included the icons in the editor doesn’t display right, and the same with the admin bar icons…
Here is a screenshot: https://i.imgur.com/MtSrlQQ.png

This is the code I’m using to load the editor:

$content = $post->post_content;
	$editor_id = 'editpost';
	$mce_plugins = 'wordpress, wplink, wpdialogs';

	$editor_args = array(
		'media_buttons' => false,
		'textarea_rows' => 10,
		'wpautop' => false,
		'tinymce' => array(
			'plugins' => $mce_plugins
		)
	);

And here:

<link rel="stylesheet" id="editor-buttons-css" href="https://xxxx.no/wp-includes/css/editor.min.css?ver=4.2.2" type="text/css" media="all">
 <p><?php wp_editor( $content, $editor_id, $editor_args ); ?>