{"record":{"id":"f9614b5970066ca7","repo":"octobercms/october","slug":"system-lang-server-response-empty-f9614b","errorCode":"system::lang.server.response_empty","errorMessage":"Empty response from the server.","messagePattern":"Empty response from the server\\.","errorType":"exception","errorClass":"ApplicationException","httpStatus":null,"severity":"warning","filePath":"modules/system/classes/updatemanager/ManagesModules.php","lineNumber":178,"sourceCode":"        }\n\n        $build = $this->getBuildFromVersion($version);\n\n        $this->setBuild((int) $build);\n\n        return $build;\n    }\n\n    /**\n     * requestChangelog returns the latest changelog information.\n     */\n    public function requestChangelog()\n    {\n        $result = Http::get('https://octobercms.com/changelog?json='.SystemHelper::VERSION);\n        $contents = $result->body();\n\n        if ($result->status() === 404) {\n            throw new ApplicationException(Lang::get('system::lang.server.response_empty'));\n        }\n\n        if ($result->status() !== 200) {\n            throw new ApplicationException(\n                strlen($contents)\n                ? $contents\n                : Lang::get('system::lang.server.response_empty')\n            );\n        }\n\n        try {\n            $resultData = json_decode($contents, true);\n        }\n        catch (Exception $ex) {\n            throw new ApplicationException(Lang::get('system::lang.server.response_invalid'));\n        }\n\n        return $resultData;","sourceCodeStart":160,"sourceCodeEnd":196,"githubUrl":"https://github.com/octobercms/october/blob/b608633a7e8922487d91a8161499020121c3b3bf/modules/system/classes/updatemanager/ManagesModules.php#L160-L196","documentation":"ManagesModules::requestChangelog() fetches https://octobercms.com/changelog?json={version} to power the backend 'what's new' panel. A 404 status there throws — but note it reuses the 'Empty response from the server' (response_empty) key instead of response_not_found, an upstream quirk: the message says 'empty' while the real condition is 'not found'. So if you see this exact message, check for a 404 from the changelog endpoint, not necessarily an empty body.","triggerScenarios":"Opening the Updates area / changelog view when octobercms.com returns 404 for the changelog URL: site moved the endpoint, the ?json=VERSION parameter routes to a missing page for that build, or an intercepting proxy returns 404.","commonSituations":"Endpoint changes on octobercms.com after upgrading an old install; custom BLOCKED_URL/proxy setups answering 404; local hosts-file overrides; the changelog feature being non-critical so failures surprise admins during routine update checks.","solutions":["Open https://octobercms.com/changelog?json=YOUR-VERSION in a browser to see the raw status","Update the CMS to a current build whose changelog client matches the live endpoint","If a proxy/firewall rewrites the request, allow octobercms.com for the server","Treat it as non-blocking: core updates still work; the changelog panel just can't render"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n    $changelog = \\System\\Classes\\UpdateManager::instance()->requestChangelog();\n} catch (\\October\\Rain\\Exception\\ApplicationException $ex) {\n    // changelog is informational — never let it break the Updates page\n    $changelog = [];\n    Log::info('Changelog unavailable: ' . $ex->getMessage());\n}","preventionTips":["Treat the changelog panel as optional: always catch and degrade","Remember this branch's message says 'Empty response' but means HTTP 404","Keep the CMS updated so the changelog URL matches the live endpoint"],"tags":["octobercms","updates","changelog","network","http-404"],"backgroundTag":"http-404","analyzedSha":"b608633a7e8922487d91a8161499020121c3b3bf","analyzedAt":"2026-08-21T04:24:57.515Z","schemaVersion":2},"datasetVersion":"2026-08-21T11:28:35.574Z"}