Fatal error: Uncaught exception Error with message Call to a member function compile() on integer thrown in vendor/oyejorge/less.php/lib/Less/Tree/Ruleset.php on line 94
#0 vendor/oyejorge/less.php/lib/Less/Parser.php(199): Less_Tree_Ruleset->compile(Object(Less_Environment))
#1 composer/vendor/heimrichhannot/contao-extassets/classes/ExtCssCombiner.php(272): Less_Parser->getCss()
#2 composer/vendor/heimrichhannot/contao-extassets/classes/ExtCssCombiner.php(102): ExtAssets\ExtCssCombiner->addBootstrap()
#3 composer/vendor/heimrichhannot/contao-extassets/classes/ExtCss.php(390): ExtAssets\ExtCssCombiner->__construct(Object(Contao\Model\Collection), Array, true)
#4 composer/vendor/heimrichhannot/contao-extassets/classes/ExtCss.php(347): ExtAssets\ExtCss->parseExtCss(Object(Contao\LayoutModel), Array)
#5 system/modules/core/library/Contao/Controller.php(710): ExtAssets\ExtCss->hookReplaceDynamicScriptTags('...')
#6 system/modules/core/classes/FrontendTemplate.php(102): Contao\Controller::replaceDynamicScriptTags('...')
#7 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#8 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#9 index.php(20): Contao\FrontendIndex->run()
#10 {main}