A blank, white page on a website suggests that something is wrong with the website. But it can’t be fixed if the cause of the issue is not determined. Thus, an error message is helpful to come up with an appropriate solution and to avoid making more issues on the website. Most of the time, the error message is turned off by default. Follow the steps below on how to make the error message appear on a Magento website when something is wrong.
Step 2. Click File Manager. Skip this step if you are logging in via FTP.
Step 3. Locate the app/bootstrap.php file.
Step 4. Right click on the file and select Edit.
Step 5. Click the Edit button.
Step 6. Click Edit on the pop-up.
Step 7. Locate the line shown in the screenshot below.
Step 8. Remove the [#] hashtag to uncomment the line.
Step 9. Click the Save Changes button.
The previously blank web page of your website should now display an error message. This error message helps for troubleshooting the website issue.