{"id":20132,"date":"2025-03-14T09:50:00","date_gmt":"2025-03-14T09:50:00","guid":{"rendered":"https:\/\/www.webhosting.uk.com\/kb\/?p=20132"},"modified":"2026-06-03T13:28:31","modified_gmt":"2026-06-03T13:28:31","slug":"how-to-fix-plesk-panel-500-internal-server-error","status":"publish","type":"post","link":"https:\/\/www.webhosting.uk.com\/kb\/how-to-fix-plesk-panel-500-internal-server-error\/","title":{"rendered":"How to Fix Plesk Panel 500 Internal Server Error"},"content":{"rendered":"<p>This article explains how to fix Plesk Panel 500 Internal server error.<\/p>\n<p><strong>If the Plesk panel fails to open and displays the following error:<\/strong><\/p>\n<p>500 Internal Server Error<\/p>\n<p>Symptoms:<\/p>\n<ul>\n<li>The same issue occurs when accessing any .php file inside %plesk_dir%\\admin\\htdocs\\.<\/li>\n<li>The one-time login link command also fails.<br \/>\n<a href=\"https:\/\/www.webhosting.uk.com\/kb\/wp-content\/uploads\/2025\/03\/Snag_39303bc7.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-20133 size-full\" src=\"https:\/\/www.webhosting.uk.com\/kb\/wp-content\/uploads\/2025\/03\/Snag_39303bc7.png\" alt=\"command prompt\" width=\"862\" height=\"221\" srcset=\"https:\/\/www.webhosting.uk.com\/kb\/wp-content\/uploads\/2025\/03\/Snag_39303bc7.png 862w, https:\/\/www.webhosting.uk.com\/kb\/wp-content\/uploads\/2025\/03\/Snag_39303bc7-300x77.png 300w, https:\/\/www.webhosting.uk.com\/kb\/wp-content\/uploads\/2025\/03\/Snag_39303bc7-768x197.png 768w\" sizes=\"auto, (max-width: 862px) 100vw, 862px\" \/><\/a><\/li>\n<\/ul>\n<p>Cause:<\/p>\n<p>The file %plesk_dir%\\admin\\engine\\php-cgi.exe is missing.<\/p>\n<p>Resolution:<\/p>\n<ol>\n<li>Restore the missing php-cgi.exe file from another working Plesk server running the same version (e.g., 18.0.53).<\/li>\n<li>If an Antivirus is installed, check if the file was moved to quarantine and restore it.<\/li>\n<li>Add %plesk_dir% to the Antivirus exceptions to prevent future issues.<\/li>\n<\/ol>\n<p>This way, you can fix the Plesk Panel 500 Internal Server Error. Hope you liked our article.<\/p>\n<div style=\"background: #E6F0FF; padding: 15px; border-left: 4px solid #0047BA; margin: 20px 0;\"><strong>Need greater control over Plesk and Windows server administration?<\/strong><br \/>\nOur <a href=\"https:\/\/www.webhosting.uk.com\/windows-vps\">Windows VPS Hosting<\/a> plans provide dedicated resources and full administrative access for advanced hosting management and troubleshooting.<\/div>\n<p style=\"text-align: center;\"><em><strong>Need to troubleshoot errors in cPanel? Learn more here <a href=\"https:\/\/www.webhosting.uk.com\/kb\/view-error-log-in-cpanel\/\">How to view the error log in your cPanel account<\/a><\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This article explains how to fix Plesk Panel 500 Internal server error. If the Plesk panel fails to open and displays the following error: 500 Internal Server Error Symptoms: The&hellip;<\/p>\n<p><a href=\"https:\/\/www.webhosting.uk.com\/kb\/how-to-fix-plesk-panel-500-internal-server-error\/\" class=\"more-link\">Read More<\/a><\/p>\n<div class='heateorSssClear'><\/div><div  class='heateor_sss_sharing_container heateor_sss_horizontal_sharing' data-heateor-sss-href='https:\/\/www.webhosting.uk.com\/kb\/how-to-fix-plesk-panel-500-internal-server-error\/'><div class='heateor_sss_sharing_title' style=\"font-weight:bold\" >Spread the love<\/div><div class=\"heateor_sss_sharing_ul\"><a aria-label=\"Facebook\" class=\"heateor_sss_facebook\" href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fwww.webhosting.uk.com%2Fkb%2Fhow-to-fix-plesk-panel-500-internal-server-error%2F\" title=\"Facebook\" rel=\"nofollow noopener\" target=\"_blank\" style=\"font-size:32px!important;box-shadow:none;display:inline-block;vertical-align:middle\"><span 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