The issue After being inactive for a while, I logged in and attempted to update Flarum via the control panel, but I encountered the error shown in the attached screenshot. Post some information here like what you expected to see, but got instead. If you can find any logs in /storage/logs or in your browser console that relate to the issue, add them. flarum-2026-07-23.txt[2026-07-23 03:19:21] flarum.ERROR: Error: Call to undefined function Flarum\Foundation\Console\exec() in /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php:198 Stack trace: #0 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php(84): Flarum\Foundation\Console\InfoCommand->detectWebServerPhpVersion() #1 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Console/AbstractCommand.php(37): Flarum\Foundation\Console\InfoCommand->fire() #2 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Command/Command.php(298): Flarum\Console\AbstractCommand->execute() Expand preview Collapse preview Download file Error previewing file. It may have been deleted, or the provided file ID is invalid. { const figure = document.currentScript.parentElement; const previewEl = figure.querySelector('.FofUpload-TextPreviewFull'); const toggleBtn = figure.querySelector('.FofUpload-TextPreviewToggle'); const downloadLink = figure.querySelector('.FofUpload-TextPreviewDownload'); function createCodeHtml(text) { const codeEl = document.createElement('code'); codeEl.innerText = text; return `${codeEl.outerHTML}`; } function handleError(e) { figure.setAttribute('data-error', 'true'); console.group('[FoF Upload] Failed to preview text file.'); console.error('Failed to load text file: ' + url); console.log(e); console.groupEnd(); } const forumOrigin = new URL(location.origin); let url; try { url = new URL('https://cdn.discuss.flarum.org/2026-07-23/1784778828-912620-flarum-2026-07-23.txt'); } catch (e) { handleError(e); url = null; } const isCrossOrigin = url && forumOrigin.origin !== url.origin; // Cross-origin files (e.g. CDN) cannot be fetched from the browser — // hide the expand toggle and show a download link instead. if (isCrossOrigin) { toggleBtn.style.display = 'none'; } else { downloadLink.style.display = 'none'; } let fileContent = null; // Only wire up the expand toggle if we have a snippet and a same-origin URL. if (true && url && !isCrossOrigin) { toggleBtn.addEventListener('click', () => { if (fileContent !== null) { const expanded = figure.getAttribute('data-expanded') === 'true'; figure.setAttribute('data-expanded', !expanded); return; } figure.setAttribute('data-loading', 'true'); fetch(url) .then(response => { if (!response.ok) { figure.setAttribute('data-loading', 'false'); throw response; } return response.text(); }) .then(text => { fileContent = text; previewEl.innerHTML = createCodeHtml(text); figure.setAttribute('data-loading', 'false'); const expanded = figure.getAttribute('data-expanded') === 'true'; figure.setAttribute('data-expanded', !expanded); }) .catch(handleError); }); } } Flarum information Post your output of php flarum info here. Without this information providing support will take longer! $ php flarum info Flarum core: 1.8.17 PHP Fatal error: Uncaught Error: Call to undefined function Flarum\Foundation\Console\exec() in /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php:198 Stack trace: #0 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php(84): Flarum\Foundation\Console\InfoCommand->detectWebServerPhpVersion() #1 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Console/AbstractCommand.php(37): Flarum\Foundation\Console\InfoCommand->fire() #2 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Command/Command.php(298): Flarum\Console\AbstractCommand->execute() #3 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Application.php(1058): Symfony\Component\Console\Command\Command->run() #4 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Application.php(301): Symfony\Component\Console\Application->doRunCommand() #5 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Application.php(171): Symfony\Component\Console\Application->doRun() #6 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Console/Server.php(42): Symfony\Component\Console\Application->run() #7 /home/datasense/web/freebtc.my/public_html/flarum(24): Flarum\Console\Server->listen() #8 {main} thrown in /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php on line 198 if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); }

Update Flarum Error

DataSense

The issue

After being inactive for a while, I logged in and attempted to update Flarum via the control panel, but I encountered the error shown in the attached screenshot.

Post some information here like what you expected to see, but got instead. If you can find any logs in /storage/logs or in your browser console that relate to the issue, add them.

flarum-2026-07-23.txt

[2026-07-23 03:19:21] flarum.ERROR: Error: Call to undefined function Flarum\Foundation\Console\exec() in /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php:198
Stack trace:
#0 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php(84): Flarum\Foundation\Console\InfoCommand->detectWebServerPhpVersion()
#1 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Console/AbstractCommand.php(37): Flarum\Foundation\Console\InfoCommand->fire()
#2 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Command/Command.php(298): Flarum\Console\AbstractCommand->execute()

Download file

Error previewing file. It may have been deleted, or the provided file ID is invalid.

Flarum information

Post your output of php flarum info here. Without this information providing support will take longer!

$ php flarum info
Flarum core: 1.8.17
PHP Fatal error:  Uncaught Error: Call to undefined function Flarum\Foundation\Console\exec() in /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php:198
Stack trace:
#0 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php(84): Flarum\Foundation\Console\InfoCommand->detectWebServerPhpVersion()
#1 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Console/AbstractCommand.php(37): Flarum\Foundation\Console\InfoCommand->fire()
#2 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Command/Command.php(298): Flarum\Console\AbstractCommand->execute()
#3 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Application.php(1058): Symfony\Component\Console\Command\Command->run()
#4 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Application.php(301): Symfony\Component\Console\Application->doRunCommand()
#5 /home/datasense/web/freebtc.my/public_html/vendor/symfony/console/Application.php(171): Symfony\Component\Console\Application->doRun()
#6 /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Console/Server.php(42): Symfony\Component\Console\Application->run()
#7 /home/datasense/web/freebtc.my/public_html/flarum(24): Flarum\Console\Server->listen()
#8 {main}
  thrown in /home/datasense/web/freebtc.my/public_html/vendor/flarum/core/src/Foundation/Console/InfoCommand.php on line 198

Karl

DataSense uninstall those extensions listed and proceed with the update. Then install them one by one 😉

DataSense

Karl uninstall those extensions listed and proceed with the update. Then install them one by one

Sorry, I'm still new to this, so I'm worried about accidentally deleting the wrong thing. Would you mind providing a step-by-step guide?

For your information, I have shell access to the Flarum hosting server, so I can run commands if needed.

Karl

DataSense composer remove x/xxx
X = vendor
XXX = package