Unsupported operand types: string
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kreadiv commented
If no prices are defined because Isotope should be used as "Product Catalog", this error message appears:
TypeError: "Unsupported operand types: string * int" at /vendor/isotope/isotope-core/system/modules/isotope/library/Isotope/Model/ProductCollectionItem.php line 342
The method getPrice() returns an empty string. Shouldn't return the method "null" if no price is set?