WP Dashboard: QTags is not defined

When loggin in to WP dashboard, I’m betting error in console log: index.php:1069 Uncaught ReferenceError: QTags is not defined

What that runs is:

<script type="text/javascript">
			QTags.addButton( 'jcifreequicktag', 'JSON Content Importer', '[jsoncontentimporter url=https://luovi.fi/wp-content/plugins/json-content-importer/json/gutenbergblockexample1.json debugmode=10 basenode=level1]{start}<br>{subloop-array:level2:-1}{level2.key}<br>{subloop:level2.data:-1}id: {level2.data.id}<br>{/subloop:level2.data}{/subloop-array:level2}[/jsoncontentimporter]', '', '', '', 1 );
		</script>

Error does not break anything but it makes our update-tests to fail.

Using WordPress 6.0.2