Move thumbnails file location to {$upload_path}/thumbnails or {$upload_path}/sites/{$blog_id}/thumbnails for multisite.
More Plugins
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Image Prioritizer
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SUBRE – Product Subscription for WooCommerce – Recurring Payments
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EdgeTariff for WooCommerce
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Smartcat Translator for WPML
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BuddyPress Password Strength Meter
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BibleGateway Links Shortcode
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Datareporter Webcare
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WP All Import – Import Add-On for ACF
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HT Security
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Codepress Menu
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Shipping Rate By Cities
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Block Gallery to Carousel Lightbox
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SEO Information Viewer & Analyzer
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Bitcoin News
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BusinessPress
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Christian Hymns
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Woo Cashback
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Contact Form 7 Spam Killer
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Responsive Navigation Block
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Menu Override