1 exception(s):
Exception #0 (Exception): Deprecated Functionality: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /home/ropecour/public_html/app/code/Amasty/SeoHtmlSitemap/Model/Sitemap.php on line 231

Exception #0 (Exception): Deprecated Functionality: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /home/ropecour/public_html/app/code/Amasty/SeoHtmlSitemap/Model/Sitemap.php on line 231
<pre>#1 explode() called at [app/code/Amasty/SeoHtmlSitemap/Model/Sitemap.php:231]
#2 Amasty\SeoHtmlSitemap\Model\Sitemap->getExcludeCategoryIds() called at [app/code/Amasty/SeoHtmlSitemap/Model/Sitemap.php:203]
#3 Amasty\SeoHtmlSitemap\Model\Sitemap->getCategories() called at [app/code/Amasty/SeoHtmlSitemap/Block/Sitemap.php:64]
#4 Amasty\SeoHtmlSitemap\Block\Sitemap->_beforeToHtml() called at [vendor/magento/framework/View/Element/AbstractBlock.php:1127]
#5 Magento\Framework\View\Element\AbstractBlock->Magento\Framework\View\Element\{closure}() called at [vendor/magento/framework/View/Element/AbstractBlock.php:1132]
#6 Magento\Framework\View\Element\AbstractBlock->_loadCache() called at [vendor/magento/framework/View/Element/AbstractBlock.php:676]
#7 Magento\Framework\View\Element\AbstractBlock->toHtml() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#8 Amasty\SeoHtmlSitemap\Block\Sitemap\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#9 Amasty\SeoHtmlSitemap\Block\Sitemap\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#10 Amasty\SeoHtmlSitemap\Block\Sitemap\Interceptor->___callPlugins() called at [generated/code/Amasty/SeoHtmlSitemap/Block/Sitemap/Interceptor.php:23]
#11 Amasty\SeoHtmlSitemap\Block\Sitemap\Interceptor->toHtml() called at [vendor/magento/framework/View/Layout.php:578]
#12 Magento\Framework\View\Layout->_renderBlock() called at [vendor/magento/framework/View/Layout.php:555]
#13 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#14 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#15 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#16 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#17 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#18 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:606]
#19 Magento\Framework\View\Layout->_renderContainer() called at [vendor/magento/framework/View/Layout.php:557]
#20 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#21 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#22 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#23 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#24 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#25 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:606]
#26 Magento\Framework\View\Layout->_renderContainer() called at [vendor/magento/framework/View/Layout.php:557]
#27 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#28 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#29 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#30 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#31 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#32 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:606]
#33 Magento\Framework\View\Layout->_renderContainer() called at [vendor/magento/framework/View/Layout.php:557]
#34 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#35 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#36 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#37 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#38 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#39 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:606]
#40 Magento\Framework\View\Layout->_renderContainer() called at [vendor/magento/framework/View/Layout.php:557]
#41 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#42 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#43 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#44 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#45 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#46 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:606]
#47 Magento\Framework\View\Layout->_renderContainer() called at [vendor/magento/framework/View/Layout.php:557]
#48 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#49 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#50 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#51 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#52 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#53 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:606]
#54 Magento\Framework\View\Layout->_renderContainer() called at [vendor/magento/framework/View/Layout.php:557]
#55 Magento\Framework\View\Layout->renderNonCachedElement() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#56 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#57 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#58 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:41]
#59 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [vendor/magento/framework/View/Layout.php:510]
#60 Magento\Framework\View\Layout->renderElement() called at [vendor/magento/framework/View/Layout.php:975]
#61 Magento\Framework\View\Layout->getOutput() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#62 Magento\Framework\View\Layout\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#63 Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#64 Magento\Framework\View\Layout\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:50]
#65 Magento\Framework\View\Layout\Interceptor->getOutput() called at [vendor/magento/framework/View/Result/Page.php:260]
#66 Magento\Framework\View\Result\Page->render() called at [vendor/magento/framework/View/Result/Layout.php:171]
#67 Magento\Framework\View\Result\Layout->renderResult() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#68 Magento\Framework\View\Result\Page\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#69 Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}() called at [app/code/Amasty/PageSpeedTools/Plugin/ProcessPageResult.php:46]
#70 Amasty\PageSpeedTools\Plugin\ProcessPageResult->aroundRenderResult() called at [vendor/magento/framework/Interception/Interceptor.php:135]
#71 Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#72 Magento\Framework\View\Result\Page\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/View/Result/Page/Interceptor.php:41]
#73 Magento\Framework\View\Result\Page\Interceptor->renderResult() called at [vendor/magento/framework/App/Http.php:120]
#74 Magento\Framework\App\Http->launch() called at [vendor/magento/framework/Interception/Interceptor.php:58]
#75 Magento\Framework\App\Http\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]
#76 Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/module-application-performance-monitor/Plugin/ApplicationPerformanceMonitor.php:38]
#77 Magento\ApplicationPerformanceMonitor\Plugin\ApplicationPerformanceMonitor->aroundLaunch() called at [vendor/magento/framework/Interception/Interceptor.php:135]
#78 Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#79 Magento\Framework\App\Http\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:23]
#80 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:264]
#81 Magento\Framework\App\Bootstrap->run() called at [pub/index.php:81]
</pre>