Error: Opencart\Catalog\Model\Catalog\ProductVariant::getProductVariants(): Argument #1 ($product_id) must be of type int, null given, called in /home/electronicfaucet/public_html/system/engine/loader.php on line 343
File: /home/electronicfaucet/public_html/catalog/model/catalog/product_variant.php
Line: 39

Backtrace: 0
File: /home/electronicfaucet/public_html/system/engine/loader.php
Line: 343
Class: Opencart\Catalog\Model\Catalog\ProductVariant
Function: getProductVariants

Backtrace: 1
File: /home/electronicfaucet/public_html/system/engine/proxy.php
Line: 87
Class: Opencart\System\Engine\Loader
Function: Opencart\System\Engine\{closure}

Backtrace: 2
File: /home/electronicfaucet/public_html/catalog/controller/product/category.php
Line: 368
Class: Opencart\System\Engine\Proxy
Function: __call

Backtrace: 3
File: /home/electronicfaucet/public_html/system/engine/action.php
Line: 96
Class: Opencart\Catalog\Controller\Product\Category
Function: index

Backtrace: 4
File: /home/electronicfaucet/public_html/system/framework.php
Line: 259
Class: Opencart\System\Engine\Action
Function: execute

Backtrace: 5
File: /home/electronicfaucet/public_html/index.php
Line: 20
Function: require_once