First, ensure that "mode_rewrite" is enabled on your server.
If "mode_rewrite" is enabled, you may be missing upload .htaccess file. Please upload .htaccess file to your server public directory(public_html/www/public).
Then it will be fixed.
Screenshot: https://prntscr.com/s4gwk8
If you don't find the htaccess file, please download the file from here: https://drive.google.com/file/d/1xgKBg6RtWKqpBjFpUI3rPg6DcJ9hJ69X/view?usp=sharing
Yet if you have any issues, you may check this video: https://www.youtube.com/watch?v=ay6NoLDA7Nc
Best Regards,
SpaGreen Team