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In custom theme And category page show this error-
Fatal error: Uncaught TypeError: Argument 2 passed to Magento\Catalog\Block\Product\ImageFactory::getLabel() must be of the type string, null given, called in /var/www/html/.....
1 product is added that's why in image show "1 items".
Run all commands upgrade,indexing,caching,deploy,rename var folder still getting this error
Finally,I solved,the problem is etc/view.xml I didn't create while making custom theme.
When I add file (view.xml) at this location
app/design/frontend/Theme/theme/etc/
The problem is solved.
the problem is etc/view.xml, it helped me insert code in - app/design/frontend///etc/view.xml
<?xml version="1.0"?>
<!--
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
-->
<view xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:Config/etc/view.xsd">
<media>
<images module="Magento_Catalog">
<image id="bundled_product_customization_page" type="thumbnail">
<width>140</width>
<height>140</height>
</image>
<image id="cart_cross_sell_products" type="small_image">
<width>240</width>
<height>300</height>
</image>
<image id="cart_page_product_thumbnail" type="small_image">
<width>110</width>
<height>160</height>
</image>
<image id="category_page_grid" type="small_image">
<width>240</width>
<height>300</height>
</image>
<image id="category_page_list" type="small_image">
<width>240</width>
<height>300</height>
</image>
<image id="customer_account_my_tags_tag_view" type="small_image">
<width>100</width>
<height>100</height>
</image>
<image id="customer_account_product_review_page" type="image">
<width>285</width>
<height>285</height>
</image>
<image id="customer_shared_wishlist" type="small_image">
<width>113</width>
<height>113</height>
</image>
<image id="gift_messages_checkout_small_image" type="small_image">
<width>75</width>
<height>75</height>
</image>
<image id="gift_messages_checkout_thumbnail" type="thumbnail">
<width>100</width>
<height>100</height>
</image>
<image id="mini_cart_product_thumbnail" type="thumbnail">
<width>78</width>
<height>78</height>
</image>
<image id="new_products_content_widget_grid" type="small_image">
<width>240</width>
<height>300</height>
</image>
<image id="new_products_content_widget_list" type="small_image">
<width>270</width>
<height>270</height>
</image>
<image id="new_products_images_only_widget" type="small_image">
<width>78</width>
<height>78</height>
</image>
<image id="product_base_image" type="image">
<width>265</width>
<height>265</height>
</image>
<image id="product_comparison_list" type="small_image">
<width>140</width>
<height>140</height>
</image>
<image id="product_page_image_large" type="image"/>
<image id="product_page_image_medium" type="image">
<width>700</width>
<height>700</height>
</image>
<image id="product_page_image_small" type="thumbnail">
<width>90</width>
<height>90</height>
</image>
<image id="product_swatch_image_large" type="image"/>
<image id="product_swatch_image_medium" type="image">
<width>240</width>
<height>300</height>
</image>
<image id="product_swatch_image_small" type="thumbnail">
<width>88</width>
<height>110</height>
</image>
<image id="product_page_main_image" type="image">
<width>700</width>
<height>700</height>
</image>
<image id="product_page_main_image_default" type="image">
<width>700</width>
<height>700</height>
</image>
<image id="product_page_more_views" type="thumbnail">
<width>90</width>
<height>90</height>
</image>
<image id="product_stock_alert_email_product_image" type="small_image">
<width>76</width>
<height>76</height>
</image>
<image id="product_small_image" type="small_image">
<width>135</width>
<height>135</height>
</image>
<image id="product_thumbnail_image" type="thumbnail">
<width>75</width>
<height>75</height>
</image>
<image id="recently_compared_products_grid_content_widget" type="small_image">
<width>240</width>
<height>300</height>
</image>
<image id="recently_compared_products_images_names_widget" type="thumbnail">
<width>75</width>
<height>90</height>
</image>
<image id="recently_compared_products_images_only_widget" type="thumbnail">
<width>76</width>
<height>76</height>
</image>
<image id="recently_compared_products_list_content_widget" type="small_image">
<width>270</width>
<height>207</height>
</image>
<image id="recently_viewed_products_grid_content_widget" type="small_image">
<width>240</width>
<height>300</height>
</image>
<image id="recently_viewed_products_images_names_widget" type="small_image">
<width>75</width>
<height>90</height>
</image>
<image id="recently_viewed_products_images_only_widget" type="small_image">
<width>76</width>
<height>76</height>
</image>
<image id="recently_viewed_products_list_content_widget" type="small_image">
<width>270</width>
<height>270</height>
</image>
<image id="related_products_list" type="small_image">
<width>140</width>
<height>140</height>
</image>
<image id="review_page_product_image" type="small_image">
<width>285</width>
<height>285</height>
</image>
<image id="rss_thumbnail" type="thumbnail">
<width>75</width>
<height>75</height>
</image>
<image id="sendfriend_small_image" type="small_image">
<width>75</width>
<height>75</height>
</image>
<image id="shared_wishlist_email" type="small_image">
<width>135</width>
<height>135</height>
</image>
<image id="side_column_widget_product_thumbnail" type="thumbnail">
<width>75</width>
<height>90</height>
</image>
<image id="upsell_products_list" type="small_image">
<width>140</width>
<height>140</height>
</image>
<image id="wishlist_sidebar_block" type="thumbnail">
<width>75</width>
<height>90</height>
</image>
<image id="wishlist_small_image" type="small_image">
<width>113</width>
<height>113</height>
</image>
<image id="wishlist_thumbnail" type="small_image">
<width>240</width>
<height>300</height>
</image>
</images>
</media>
<vars module="Magento_Catalog">
<!-- Gallery and magnifier theme settings. Start -->
<var name="gallery">
<var name="nav">thumbs</var> <!-- Gallery navigation style (false/thumbs/dots) -->
<var name="loop">true</var> <!-- Gallery navigation loop (true/false) -->
<var name="keyboard">true</var> <!-- Turn on/off keyboard arrows navigation (true/false) -->
<var name="arrows">true</var> <!-- Turn on/off arrows on the sides preview (true/false) -->
<var name="caption">false</var> <!-- Display alt text as image title (true/false) -->
<var name="allowfullscreen">true</var> <!-- Turn on/off fullscreen (true/false) -->
<var name="navdir">horizontal</var> <!-- Sliding direction of thumbnails (horizontal/vertical) -->
<var name="navarrows">true</var> <!-- Turn on/off on the thumbs navigation sides arrows(true/false) -->
<var name="navtype">slides</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
<var name="transition">
<var name="effect">slide
</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
<var name="duration">500</var> <!-- Sets transition duration in ms -->
</var>
<var name="fullscreen">
<var name="nav">thumbs</var> <!-- Fullscreen navigation style (false/thumbs/dots) -->
<var name="loop">true</var> <!-- Fullscreen navigation loop (true/false/null) -->
<var name="arrows">false
</var> <!-- Turn on/off arrows on the sides preview in fullscreen (true/false/null) -->
<var name="caption">false</var> <!-- Display alt text as image title in fullscreen(true/false) -->
<var name="navdir">horizontal
</var> <!--Sliding direction of thumbnails in fullscreen(horizontal/vertical) -->
<var name="navtype">slides</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
<var name="transition">
<var name="effect">dissolve
</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
<var name="duration">500</var> <!-- Sets transition duration in ms -->
</var>
</var>
</var>
<var name="magnifier">
<var name="fullscreenzoom">20</var> <!-- Zoom for fullscreen (integer)-->
<var name="top"></var> <!-- Top position of magnifier -->
<var name="left"></var> <!-- Left position of magnifier -->
<var name="width"></var> <!-- Width of magnifier block -->
<var name="height"></var> <!-- Height of magnifier block -->
<var name="eventType">hover</var> <!-- Action that atcivates zoom (hover/click) -->
<var name="enabled">false</var> <!-- Turn on/off magnifier (true/false) -->
</var>
<var name="breakpoints">
<var name="mobile">
<var name="conditions">
<var name="max-width">767px</var>
</var>
<var name="options">
<var name="options">
<var name="nav">dots</var>
</var>
</var>
</var>
</var>
<!-- end. Gallery and magnifier theme settings -->
<var name="product_small_image_sidebar_size">100</var> <!-- Override for small product image -->
<var name="product_base_image_size">275</var> <!-- Override for base product image -->
<var name="product_base_image_icon_size">48</var> <!-- Base product image icon size -->
<var name="product_list_image_size">166</var> <!-- New Product image size used in product list -->
<var name="product_zoom_image_size">370</var> <!-- New Product image size used for zooming -->
<var name="product_image_white_borders">1</var>
</vars>
<vars module="Magento_Bundle">
<var name="product_summary_image_size">58</var> <!-- New Product image size used for summary block-->
</vars>
<vars module="Js_Bundle">
<var name="bundle_size">1MB</var>
</vars>
<exclude>
<item type="file">Lib::jquery/jquery.min.js</item>
<item type="file">Lib::jquery/jquery-ui-1.9.2.js</item>
<item type="file">Lib::jquery/jquery.details.js</item>
<item type="file">Lib::jquery/jquery.details.min.js</item>
<item type="file">Lib::jquery/jquery.hoverIntent.js</item>
<item type="file">Lib::jquery/colorpicker/js/colorpicker.js</item>
<item type="file">Lib::requirejs/require.js</item>
<item type="file">Lib::requirejs/text.js</item>
<item type="file">Lib::date-format-normalizer.js</item>
<item type="file">Lib::legacy-build.min.js</item>
<item type="file">Lib::mage/captcha.js</item>
<item type="file">Lib::mage/dropdown_old.js</item>
<item type="file">Lib::mage/list.js</item>
<item type="file">Lib::mage/loader_old.js</item>
<item type="file">Lib::mage/webapi.js</item>
<item type="file">Lib::mage/zoom.js</item>
<item type="file">Lib::mage/translate-inline-vde.js</item>
<item type="file">Lib::mage/requirejs/mixins.js</item>
<item type="file">Lib::mage/requirejs/static.js</item>
<item type="file">Magento_Customer::js/zxcvbn.js</item>
<item type="file">Magento_Catalog::js/zoom.js</item>
<item type="file">Magento_Ui::js/lib/step-wizard.js</item>
<item type="file">Magento_Ui::js/form/element/ui-select.js</item>
<item type="file">Magento_Ui::js/form/element/file-uploader.js</item>
<item type="file">Magento_Ui::js/form/components/insert.js</item>
<item type="file">Magento_Ui::js/form/components/insert-listing.js</item>
<item type="directory">Magento_Ui::js/timeline</item>
<item type="directory">Magento_Ui::js/grid</item>
<item type="directory">Magento_Ui::js/dynamic-rows</item>
<item type="directory">Magento_Ui::templates/timeline</item>
<item type="directory">Magento_Ui::templates/grid</item>
<item type="directory">Magento_Ui::templates/dynamic-rows</item>
<item type="directory">Magento_Swagger::swagger-ui</item>
<item type="directory">Lib::modernizr</item>
<item type="directory">Lib::tiny_mce</item>
<item type="directory">Lib::varien</item>
<item type="directory">Lib::jquery/editableMultiselect</item>
<item type="directory">Lib::jquery/jstree</item>
<item type="directory">Lib::jquery/fileUploader</item>
<item type="directory">Lib::css</item>
<item type="directory">Lib::lib</item>
<item type="directory">Lib::extjs</item>
<item type="directory">Lib::prototype</item>
<item type="directory">Lib::scriptaculous</item>
<item type="directory">Lib::less</item>
<item type="directory">Lib::mage/adminhtml</item>
<item type="directory">Lib::mage/backend</item>
</exclude>
</view>
or delete file - etc/view.xml
