Your software
Mautic Version: 4.4.9
PHP version: 8.0
Browser: Chrome
Your problem
Mautic Version: 4.4.9
Php: 8.0
Composer Version: 2.5.8
I chose a Plugin from Mautic - Marketplace, and by clicking on install a PopUp opens to start the installation but in Browser-debug an error which is as follows:
These errors are showing in the log:
The HOME or COMPOSER_HOME environment variable must be set for composer to
run correctly
require [–dev] [–dry-run] [–prefer-source] [–prefer-dist] [–prefer-install PREFER-INSTALL] [–fixed] [–no-suggest] [–no-progress] [–no-update] [–no-install] [–update-no-dev] [-w|–update-with-dependencies] [-W|–update-with-all-dependencies] [–with-dependencies] [–with-all-dependencies] [–ignore-platform-req IGNORE-PLATFORM-REQ] [–ignore-platform-reqs] [–prefer-stable] [–prefer-lowest] [–sort-packages] [-o|–optimize-autoloader] [-a|–classmap-authoritative] [–apcu-autoloader] [–apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [–] […]
{“hostname”:“debian-4gb-nbg1-1”,“pid”:307959}
[2023-08-07 11:45:48] mautic.ERROR: Installation of plugin through Composer has failed: {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959}
[2023-08-07 11:46:04] mautic.WARNING: PHP Warning - require(/var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/getSwiftmailer_EmailSender_ListenerService.php): Failed to open stream: No such file or directory - in file /var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/appAppKernelProdContainer.php - at line 2364 {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959}
[2023-08-07 11:46:04] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\FatalThrowableError: “Failed opening required ‘/var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/getSwiftmailer_EmailSender_ListenerService.php’ (include_path=‘.:/usr/share/php’)” at /var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/appAppKernelProdContainer.php line 2364 {“exception”:"[object] (Symfony\Component\Debug\Exception\FatalThrowableError(code: 0): Failed opening required ‘/var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/getSwiftmailer_EmailSender_ListenerService.php’ (include_path=‘.:/usr/share/php’) at /var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/appAppKernelProdContainer.php:2364)
[stacktrace]
#0 /var/www/html/mautic/var/cache/pro_/ContainerGXZw3Mj/appAppKernelProdContainer.php(2597): ContainerGXZw3Mj\appAppKernelProdContainer->load()
#1 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(301): ContainerGXZw3Mj\appAppKernelProdContainer->ContainerGXZw3Mj\{closure}()
#2 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(264): Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}()
#3 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(239): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch()
#4 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(73): Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
#5 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(103): Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
#6 /var/www/html/mautic/vendor/symfony/http-kernel/Kernel.php(166): Symfony\Component\HttpKernel\HttpKernel->terminate()
#7 /var/www/html/mautic/vendor/stack/builder/src/Stack/StackedHttpKernel.php(32): Symfony\Component\HttpKernel\Kernel->terminate()
#8 /var/www/html/mautic/vendor/stack/run/src/Stack/run.php(16): Stack\StackedHttpKernel->terminate()
#9 /var/www/html/mautic/docroot/index.php(24): Stack
un()
#10 {main}
“} {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959}
[2023-08-07 11:46:04] mautic.CRITICAL: Exception thrown when handling an exception (RuntimeException: Failed to start the session because headers have already been sent by “/var/www/html/mautic/vendor/symfony/http-foundation/Response.php” at line 1239. at /var/www/html/mautic/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php line 152) {“exception”:”[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/html/mautic/vendor/symfony/http-foundation/Response.php" at line 1239. at /var/www/html/mautic/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:152)
[stacktrace]
#0 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php(359): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
#1 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Session.php(251): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->getBag()
#2 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Session.php(273): Symfony\Component\HttpFoundation\Session\Session->getBag()
#3 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Session.php(73): Symfony\Component\HttpFoundation\Session\Session->getAttributeBag()
#4 /var/www/html/mautic/docroot/app/bundles/CoreBundle/EventListener/EnvironmentSubscriber.php(47): Symfony\Component\HttpFoundation\Session\Session->get()
#5 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(264): Mautic\CoreBundle\EventListener\EnvironmentSubscriber->onKernelRequestSetTimezone()
#6 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(239): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch()
#7 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(73): Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
#8 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(145): Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
#9 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(81): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#10 /var/www/html/mautic/docroot/app/bundles/CoreBundle/EventListener/ExceptionListener.php(67): Symfony\Component\HttpKernel\HttpKernel->handle()
#11 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(264): Mautic\CoreBundle\EventListener\ExceptionListener->onKernelException()
#12 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(239): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch()
#13 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(73): Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
#14 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(229): Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
#15 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(120): Symfony\Component\HttpKernel\HttpKernel->handleThrowable()
#16 /var/www/html/mautic/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php(129): Symfony\Component\HttpKernel\HttpKernel->terminateWithException()
#17 /var/www/html/mautic/vendor/symfony/error-handler/ErrorHandler.php(601): Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::Symfony\Component\HttpKernel\EventListener\{closure}()
#18 [internal function]: Symfony\Component\ErrorHandler\ErrorHandler->handleException()
#19 {main}
"} {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959}
Steps I have tried to fix the problem: