I installed an instance of Sugar 8.1 on localhost several days ago that worked with no problems. But when I tried starting it in developer mode with stack trace, it became stuck in the "Loading..." stage (see screenshot). I tried restarting the browser, restarting apache and restarting vagrant, as well as running Quick Repair from the command line. None of it helped. I also tried setting $GLOBALS['sugar_config']['developerMode'] in QuickRepairAndRebuild.php to "false" manually in the hope that this will force the application to exit developer mode, but to no effect. Is there anything else I can try to either get past the "Loading" stage or exit developer mode?