In your config.php there should be a line that says:
Change it to say:
Then save the file and try viewing the page again and see if it displays any errors. If not then they are likely going to a log file. You could also add below that line:
If you don’t know where your web server’s error log files are they may be in the same folder as the file causing the error, such as /admin/error.log or something like that.