Error installing Tabs and Accordion

When trying to install "Tabs and Accordion" I only get errors:

Ett fel har inträffat

0 Failed opening required '/data/6/d/6d3ea434-1108-4d29-aeb6-c0cb5a1b0eba/biljett.rojteatern.nu/public_html/administrator/cache/autoload_psr4.php' (include_path='.:/usr/share/php')

Call stack
# Function Location
1 () JROOT/libraries/namespacemap.php:104
2 JNamespacePsr4Map->load() JROOT/libraries/src/Application/ExtensionNamespaceMapper.php:34
3 Joomla\CMS\Application\CMSApplication->createExtensionNamespaceMap() JROOT/tmp/install_678d1d2f15cea/packages/j4/pkg_regularlabs/script.install.php:71
4 pkg_regularlabsInstallerScript::recreateNamespaceMap() JROOT/tmp/install_678d1d2f15cea/packages/j4/pkg_regularlabs/script.install.php:35
5 pkg_regularlabsInstallerScript->postflight()
6 call_user_func_array() JROOT/libraries/src/Installer/LegacyInstallerScript.php:158
7 Joomla\CMS\Installer\LegacyInstallerScript->__call() JROOT/libraries/src/Installer/LegacyInstallerScript.php:187
8 Joomla\CMS\Installer\LegacyInstallerScript->callOnScript() JROOT/libraries/src/Installer/LegacyInstallerScript.php:113
9 Joomla\CMS\Installer\LegacyInstallerScript->postflight() JROOT/libraries/src/Installer/Adapter/PackageAdapter.php:599
10 Joomla\CMS\Installer\Adapter\PackageAdapter->triggerManifestScript() JROOT/libraries/src/Installer/InstallerAdapter.php:802
11 Joomla\CMS\Installer\InstallerAdapter->install() JROOT/libraries/src/Installer/Installer.php:647
12 Joomla\CMS\Installer\Installer->install() JROOT/libraries/src/Installer/Adapter/PackageAdapter.php:157
13 Joomla\CMS\Installer\Adapter\PackageAdapter->copyBaseFiles() JROOT/libraries/src/Installer/InstallerAdapter.php:740
14 Joomla\CMS\Installer\InstallerAdapter->install() JROOT/libraries/src/Installer/Installer.php:647
15 Joomla\CMS\Installer\Installer->install() JROOT/administrator/components/com_installer/src/Model/InstallModel.php:195
16 Joomla\Component\Installer\Administrator\Model\InstallModel->install() JROOT/administrator/components/com_installer/src/Controller/InstallController.php:52
17 Joomla\Component\Installer\Administrator\Controller\InstallController->install() JROOT/libraries/src/MVC/Controller/BaseController.php:693
18 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
19 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361
20 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:143
21 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:186
22 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:293
23 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:61
24 require_once() JROOT/administrator/index.php:32

Joomla 4.4.10 with YOUTHEME template.

Tried both my labsite and Livesite (Above is from labsite.

Tried to delete the "autoload_psr4.php" with no luck.

//Dennis

Hi,

I tried to clear the cache /administrator/cache via the "Systems" tab - with no change.

//Dennis

biljett.rojteatern.nu is our labsite
rojteatern.nu is our production site

Aiming to mimic the old YouJoomla tabs that we use at our site: www.rojteatern.nu/tidigare-produktioner/...man-och-soporna.html sinve YOUJoomla is lo longer.

Hi,

Sorry the account at rojteatern.nu wasn't activated, and the ftp should work now.

/Dennis

Sorry, can't get it to work.