Qode shortcode not visible

Unfortunately I do not own a license for the Central theme, so I cannot take a real test. Does the problem only occurs within Page builder or even if you create a standard widget (under the Appearance menu)?
Could you post a screenshot?

Problem only occurs within Page builder, no problem with standard widget (under the Appearance menu).

screen shots on the link below, many thanks,

https://nitzaflantz.com/qode-issue/

It looks like a CSS overflow issue. The problem probably comes from a CSS file included in Page Builder. In particular the rule at line 148 of file /plugins/siteorigin-panels/css/jquery-ui-theme.css:

.ui-dialog.panels-admin-dialog .ui-dialog-content {
	max-height: 600px;
	overflow: auto;
}

If you change it to the following, it should work:

.ui-dialog.panels-admin-dialog .ui-dialog-content {
	max-height: 600px;
	overflow: visible;
}

I’d suggest to contact the author of Page Builder (he’s very friendly) and ask him to apply this change (or an alternative solution).