Function /modules/core/Action.php@60::__construct is deprecated, please move all to core\Request, just like PageBuilder is in fact Response
Called at "@-9 ();

Remove subpage from Action, use subdirectories ...
Called at "@-9 ();

set language from actual UI setting
Called at "/initialize.php@22 core\Response::setUp();

actually set some requested language - can get it from header once, otherwise get it from UI
Called at "/initialize.php@23 core\Request::load();

replace page in index.php and DEFAULT_PAGE with DEFAULT_RESOURCE
Called at "/initialize.php@23 core\Request::load();

It would be safer and more efficient to roll up the css and js into the single record - not use the recursion call!
Called at "/index.php@20 core\factory\ThemeFamilyFactory::setThemeFamily('base');

It would be safer and more efficient to roll up the css and js into the single record - not use the recursion call!
Called at "/index.php@65 core\factory\ThemeFamilyFactory::setThemeFamily('base');

remove dependencies to core/codelists/codeListsTable.php
Called at "/index.php@121 {closure}();

loading user from session
Called at "/modules/core/User.php@32 core\User::loadUser();

using generated crossroads
Called at "/index.php@52 include('/var/www/html/instance-1/crossroadsGenerated.php');

including from Login
Called at "/crossroadsGenerated.php@247 include('/var/www/html/instance-1/modules/login/includeGenerated.php');