This needs a Pro widget. Pro widgets come with the Lite, Pro and Developer plans. Every paid plan starts with a 14-day free trial. See Free and Pro widgets.
1
Open your widget
On your dashboard, click the widget.
2
Choose Other
On the Advanced tab, set Photo Link to one of these options:
- Other: the page opens in a new tab.
- Other (Same Window): the page opens in the same window.
3
Enter the link
In Photo Link Url, enter the full address of the page, for example 
https://www.example.com/shop.
4
Save
Click Update & Get Widget to save. You do not need to change the code on your website.