Fatal error: Uncaught Error: Only variables can be passed by reference in /mnt/HC_Volume_3139231/comkre12/web/libs/ts_classes.compass_frontend.x4:127 Stack trace: #0 /mnt/HC_Volume_3139231/comkre12/vendor/travelseller/frontend-rest/ts_frontend.php(274): compass_frontend->index_action() #1 /mnt/HC_Volume_3139231/comkre12/web/index.php(82): Travelseller\FrontendREST\ts_frontend->run() #2 {main} thrown in /mnt/HC_Volume_3139231/comkre12/web/libs/ts_classes.compass_frontend.x4 on line 127