Fatal error: Uncaught Less_Exception_Compiler: variable @screen-lg-desktop-container is undefined in file /var/www/fjs/fjs.fudutsinma.edu.ng/plugins/themes/graxynet/styles/layout.less in layout.less on line 18, column 13 16| .pkp_structure_page { 17| margin: 0 auto; 18| max-width: @screen-lg-desktop-container; 19| background: @bg; 20| box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); 21| in /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Variable.php:53 Stack trace: #0 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Expression.php(46): Less_Tree_Variable->compile() #1 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Value.php(25): Less_Tree_Expression->compile() #2 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Rule.php(76): Less_Tree_Value->compile() #3 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Ruleset.php(95): Less_Tree_Rule->compile() #4 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Ruleset.php(95): Less_Tree_Ruleset->compile() #5 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Parser.php(181): Less_Tree_Ruleset->compile() #6 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/classes/template/PKPTemplateManager.php(504): Less_Parser->getCss() #7 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/controllers/page/PageHandler.php(123): PKP\template\PKPTemplateManager->compileLess() #8 [internal function]: PKP\controllers\page\PageHandler->css() #9 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/classes/core/PKPRouter.php(327): call_user_func() #10 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/classes/core/PKPComponentRouter.php(265): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #11 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/classes/core/Dispatcher.php(157): PKP\core\PKPComponentRouter->route() #12 /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/classes/core/PKPApplication.php(426): PKP\core\Dispatcher->dispatch() #13 /var/www/fjs/fjs.fudutsinma.edu.ng/index.php(21): PKP\core\PKPApplication->execute() #14 {main} thrown in /var/www/fjs/fjs.fudutsinma.edu.ng/lib/pkp/lib/vendor/wikimedia/less.php/lib/Less/Tree/Variable.php on line 53