General Questions/New to Joomla! 4.x • Upgrade to Joomla 4

Hello dear all,
When I upgraded to joomla 4 it shows error 500 for both front and backend site. I asked my webhosting they replied below..What can I do?
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> 0 Class 'JModel' not found

Call stack
# Function Location
1 () JROOT/administrator/components/com_admintools/models/storage.php:23
2 require_once() JROOT/plugins/system/admintools/admintools/main.php:259
3 plgSystemAdmintools->loadComponentParameters() JROOT/plugins/system/admintools/admintools/main.php:78
4 plgSystemAdmintools->__construct() JROOT/libraries/src/Extension/ExtensionManagerTrait.php:242
5 Joomla\CMS\Application\CMSApplication->loadPluginFromFilesystem() JROOT/libraries/src/Extension/ExtensionManagerTrait.php:160
6 Joomla\CMS\Application\CMSApplication->loadExtension() JROOT/libraries/src/Extension/ExtensionManagerTrait.php:99
7 Joomla\CMS\Application\CMSApplication->bootPlugin() JROOT/libraries/src/Plugin/PluginHelper.php:232
8 Joomla\CMS\Plugin\PluginHelper::import() JROOT/libraries/src/Plugin/PluginHelper.php:192
9 Joomla\CMS\Plugin\PluginHelper::importPlugin() JROOT/libraries/src/Application/CMSApplication.php:744
10 Joomla\CMS\Application\CMSApplication->initialiseApp() JROOT/libraries/src/Application/AdministratorApplication.php:312
11 Joomla\CMS\Application\AdministratorApplication->initialiseApp() JROOT/libraries/src/Application/AdministratorApplication.php:165
12 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:293
13 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:61
14 require_once() JROOT/administrator/index.php:32

Statistics: Posted by clairewang — Fri Feb 16, 2024 2:59 pm

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