All - previous steps and DB changes successful - almost at the end of the installer. Removed and added back the previous 4.7 DB and re-ran, exactly the same error.

Running this locally

• MySQL 10.4.32-MariaDB

• PHP 8.2.12

Error Details

MySQL server has gone away

#0 D:\xampp\htdocs\forums\system\Db\Db.php(1010): IPS\Db->preparedQuery('/*test::root::I...', Array) #1 D:\xampp\htdocs\forums\system\Theme\Theme.php(4382): IPS\Db->insert('core_theme_reso...', Array) #2 D:\xampp\htdocs\forums\system\Application\Application.php(2854): IPS\Theme::addResource(Array, true) #3 D:\xampp\htdocs\forums\applications\core\sources\Setup\Upgrade.php(1068): IPS\Application->installTemplates(true, 1125, 75) #4 D:\xampp\htdocs\forums\applications\core\sources\Setup\Upgrade.php(433): IPS\core\Setup\Upgrade->IPS\core\Setup\{closure}('core') #5 D:\xampp\htdocs\forums\applications\core\sources\Setup\Upgrade.php(1058): IPS\core\Setup\Upgrade->appLoop(Array, Object(Closure)) #6 D:\xampp\htdocs\forums\applications\core\sources\Setup\Upgrade.php(369): IPS\core\Setup\Upgrade->step9(Array) #7 D:\xampp\htdocs\forums\applications\core\modules\setup\upgrade\upgrade.php(60): IPS\core\Setup\Upgrade->process(Array) #8 D:\xampp\htdocs\forums\system\Helpers\MultipleRedirect\MultipleRedirect.php(104): IPS\core\modules\setup\upgrade\upgrade->IPS\core\modules\setup\upgrade\{closure}(Array) #9 D:\xampp\htdocs\forums\applications\core\modules\setup\upgrade\upgrade.php(45): IPS\Helpers\MultipleRedirect->__construct(Object(IPS\Http\Url), Object(Closure), Object(Closure)) #10 D:\xampp\htdocs\forums\system\Dispatcher\Controller.php(139): IPS\core\modules\setup\upgrade\upgrade->manage() #11 D:\xampp\htdocs\forums\system\Dispatcher\Setup.php(261): IPS\Dispatcher\Controller->execute() #12 D:\xampp\htdocs\forums\admin\upgrade\index.php(38): IPS\Dispatcher\Setup->run() #13 {main}

D:\xampp\htdocs\forums\system\Theme\Theme.php::4382

INSERT INTO `ibf_core_theme_resources` ( `resource_set_id`, `resource_app`, `resource_location`, `resource_path`, `resource_name`, `resource_added`, `resource_filename`, `resource_data` ) VALUES ( ?, ?, ?, ?, ?, ?, ?, ? )

It's a server configuration issue: MySQL server has gone away

Increase the MySQL timeout for your XAMPP installation.