My Opencart 3.0.4.0 store was showing Error for Admin page after clearing Admin Dashboard cache (the blue button). Immediately after changing settings to show error on page, I found
Fatal error: Uncaught Error: Call to undefined method ScssPhp\ScssPhp\Compiler::compileString() in /home/xxx/xxx/website/public_html/admin/controller/startup/sass.php:17 Stack trace: #0 /home/xxx/xxx/website/public_html/system/engine/action.php(79): ControllerStartupSass->index() #1 /home/xxx/xxx/website/public_html/system/engine/router.php(67): Action->execute() #2 /home/xxx/xxx/website/public_html/system/engine/router.php(46): Router->execute() #3 /home/xxx/xxx/website/public_html/system/framework.php(179): Router->dispatch() #4 /home/xxx/xxx/website/public_html/system/startup.php(104): require_once(‘/home/xxx/…’) #5 /home/xxx/xxx/website/public_html/admin/index.php(21): start() #6 {main} thrown in /xxx/xxx/website/public_html/admin/controller/startup/sass.php on line 17
The error was fixed after moving the system/storage folder to the root (where my path was pointing).
