Shopware plugin acrivation causing error on the website

I’m experiencing an issue with a purchased Shopware plugin called ‚Preis auf Anfrage‘ (‚Price on Request‘). The plugin’s URL is: Preis auf Anfrage | Shopware Store
Once I activate the plugin in Shopware 6, an error pops up on the website. Could you please take a look at the screenshot I’ve provided? How can you assist me in resolving this?


the Product stream has no filters. So there needs to be a query to check if the product stream has filters, if not return.