So far this is the error i'm getting (which makes sense as the method is declared in smile and not in magento...but i don't understand why it's using the magento class instead of smile.

Thats the error I'm getting :

rror: Call to undefined method Magento\Catalog\Model\ResourceModel\Product\Collection\Interceptor::addSortFilterParameters() in /var/www/magento/vendor/smile/elasticsuite/src/module-elasticsuite-catalog/Plugin/LayerPlugin.php:87 Stack trace: #0 /var/www/magento/vendor/smile/elasticsuite/src/module-elasticsuite-catalog/Plugin/LayerPlugin.php(67): Smile\ElasticsuiteCatalog\Plugin\LayerPlugin->setSortParams() #1 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(121): Smile\ElasticsuiteCatalog\Plugin\LayerPlugin->beforePrepareProductCollection() #2 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(153): Sa\CustomCollection\Model\Layer\Interceptor->Magento\Framework\Interception{closure}() #3 /var/www/magento/generated/code/Sa/CustomCollection/Model/Layer/Interceptor.php(41): Sa\CustomCollection\Model\Layer\Interceptor->___callPlugins() #4 /var/www/magento/vendor/magento/module-catalog/Model/Layer.php(147): Sa\CustomCollection\Model\Layer\Interceptor->prepareProductCollection() #5 /var/www/magento/app/code/Sa/CustomCollection/Model/Layer.php(9): Magento\Catalog\Model\Layer->getProductCollection() #6 /var/www/magento/generated/code/Sa/CustomCollection/Model/Layer/Interceptor.php(23): Sa\CustomCollection\Model\Layer->getProductCollection() #7 /var/www/magento/vendor/magento/module-catalog/Block/Product/ListProduct.php(481): Sa\CustomCollection\Model\Layer\Interceptor->getProductCollection() #8 /var/www/magento/vendor/magento/module-catalog/Block/Product/ListProduct.php(121): Magento\Catalog\Block\Product\ListProduct->initializeProductCollection() #9 /var/www/magento/vendor/magento/module-catalog/Block/Product/ListProduct.php(200): Magento\Catalog\Block\Product\ListProduct->_getProductCollection() #10 /var/www/magento/vendor/magento/framework/View/Element/AbstractBlock.php(1113): Magento\Catalog\Block\Product\ListProduct->_beforeToHtml() #11 /var/www/magento/vendor/magento/framework/View/Element/AbstractBlock.php(1118): Magento\Framework\View\Element\AbstractBlock->Magento\Framework\View\Element{closure}() #12 /var/www/magento/vendor/magento/framework/View/Element/AbstractBlock.php(678): Magento\Framework\View\Element\AbstractBlock->_loadCache() #13 /var/www/magento/generated/code/Sa/CustomCollection/Block/Product/ListProduct/Interceptor.php(617): Magento\Framework\View\Element\AbstractBlock->toHtml() #14 /var/www/magento/vendor/magento/framework/View/Layout.php(578): Sa\CustomCollection\Block\Product\ListProduct\Interceptor->toHtml() #15 /var/www/magento/vendor/magento/framework/View/Layout.php(555): Magento\Framework\View\Layout->_renderBlock() #16 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #17 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #18 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #19 /var/www/magento/vendor/magento/framework/View/Layout.php(606): Magento\Framework\View\Layout\Interceptor->renderElement() #20 /var/www/magento/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Layout->_renderContainer() #21 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #22 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #23 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #24 /var/www/magento/vendor/magento/framework/View/Layout.php(606): Magento\Framework\View\Layout\Interceptor->renderElement() #25 /var/www/magento/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Layout->_renderContainer() #26 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #27 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #28 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #29 /var/www/magento/vendor/magento/framework/View/Layout.php(606): Magento\Framework\View\Layout\Interceptor->renderElement() #30 /var/www/magento/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Layout->_renderContainer() #31 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #32 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #33 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #34 /var/www/magento/vendor/magento/framework/View/Layout.php(606): Magento\Framework\View\Layout\Interceptor->renderElement() #35 /var/www/magento/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Layout->_renderContainer() #36 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #37 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #38 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #39 /var/www/magento/vendor/magento/framework/View/Layout.php(606): Magento\Framework\View\Layout\Interceptor->renderElement() #40 /var/www/magento/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Layout->_renderContainer() #41 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #42 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #43 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #44 /var/www/magento/vendor/magento/framework/View/Layout.php(606): Magento\Framework\View\Layout\Interceptor->renderElement() #45 /var/www/magento/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Layout->_renderContainer() #46 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(149): Magento\Framework\View\Layout->renderNonCachedElement() #47 /var/www/magento/vendor/magento/framework/View/Layout.php(510): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() #48 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(140): Magento\Framework\View\Layout->renderElement() #49 /var/www/magento/vendor/magento/framework/View/Layout.php(975): Magento\Framework\View\Layout\Interceptor->renderElement() #50 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Layout->getOutput() #51 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\View\Layout\Interceptor->___callParent() #52 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception{closure}() #53 /var/www/magento/generated/code/Magento/Framework/View/Layout/Interceptor.php(347): Magento\Framework\View\Layout\Interceptor->___callPlugins() #54 /var/www/magento/vendor/magento/framework/View/Result/Page.php(260): Magento\Framework\View\Layout\Interceptor->getOutput() #55 /var/www/magento/vendor/magento/framework/View/Result/Layout.php(171): Magento\Framework\View\Result\Page->render() #56 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Result\Layout->renderResult() #57 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\View\Result\Page\Interceptor->___callParent() #58 /var/www/magento/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception{closure}() #59 /var/www/magento/generated/code/Magento/Framework/View/Result/Page/Interceptor.php(95): Magento\Framework\View\Result\Page\Interceptor->___callPlugins() #60 /var/www/magento/vendor/magento/framework/App/Http.php(120): Magento\Framework\View\Result\Page\Interceptor->renderResult() #61 /var/www/magento/generated/code/Magento/Framework/App/Http/Interceptor.php(23): Magento\Framework\App\Http->launch() #62 /var/www/magento/vendor/magento/framework/App/Bootstrap.php(264): Magento\Framework\App\Http\Interceptor->launch() #63 /var/www/magento/pub/index.php(29): Magento\Framework\App\Bootstrap->run() #64 {main}

Here is my layout if it can help

<?xml version="1.0"?> <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="2columns-left" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd"> <body> <!--adding attribute tag to inherit the default stying for products--> <attribute name="class" value="page-products"/> <referenceContainer name="content"> <block class="Sa\CustomCollection\Block\Product\ListProduct" name="mycollection_index_index" as="product_list" template="Magento_Catalog::product/list.phtml"> <container name="category.product.list.additional" as="additional" /> <block class="Magento\Framework\View\Element\RendererList" name="category.product.type.details.renderers" as="details.renderers"> <block class="Magento\Framework\View\Element\Template" name="category.product.type.details.renderers.default" as="default"/> </block> <block class="Magento\Catalog\Block\Product\ProductList\Item\Container" name="category.product.addto" as="addto"> <block class="Magento\Catalog\Block\Product\ProductList\Item\AddTo\Compare" name="category.product.addto.compare" as="compare" template="Magento_Catalog::product/list/addto/compare.phtml"/> </block> <block class="Magento\Catalog\Block\Product\ProductList\Toolbar" name="product_list_toolbar" template="Magento_Catalog::product/list/toolbar.phtml"> <block class="Magento\Theme\Block\Html\Pager" name="product_list_toolbar_pager"/> </block> <action method="setToolbarBlockName"> <argument name="name" xsi:type="string">product_list_toolbar</argument> </action> </block> </referenceContainer> <referenceContainer name="sidebar.main"> <block class="Sa\CustomCollection\Block\Navigation" name="catalog.leftnav" as="navigation" before="-" template="Magento_LayeredNavigation::layer/view.phtml"> <block class="Sa\CustomCollection\Block\Navigation\State" name="catalog.navigation.state" as="state" template="Magento_LayeredNavigation::layer/state.phtml" /> <block class="Magento\LayeredNavigation\Block\Navigation\FilterRenderer" name="catalog.navigation.renderer" as="renderer" template="Magento_LayeredNavigation::layer/filter.phtml"> <arguments> <argument name="product_layer_view_model" xsi:type="object">Magento\LayeredNavigation\ViewModel\Layer\Filter</argument> </arguments> </block> </block> </referenceContainer> <referenceBlock name="mycollection_index_index"> <arguments> <argument name="viewModel" xsi:type="object">Magento\Catalog\ViewModel\Product\OptionsData</argument> </arguments> </referenceBlock> </body> </page> 

And here is my module structure, feel free to ask for any file details

EDIT (Removed all previous code and error from the issue) : Please find latest evolution and description of the issue to the smile elastic suite discussion there : https://github.com/Smile-SA/elasticsuite/discussions/3018#discussioncomment-6616473

"smile/elasticsuite": "~2.10.13"