Debugging Errors

When using BookStack, especially when initially setting it up or after updating, you may come across some errors. While we try to reduce these as much as possible and make them helpful sometimes you may come across a bland “An error has occurred” message. This is to prevent any potentially sensitive information being shown to all users.

This page details how you can find out more information about errors you may face and the resolutions to common problems we often see.

• Error Log File
• Debug View
• Common Issues & Resolutions
  • Blank White Screen on Access
  • No Styles and Large Icons on Access
  • Failing Database or Auth System Credentials
  • Broken Links or No Images After APP_URL Change
• Submitting Issues

Error Log File

On a common installation, an error log can be found at the path storage/logs/laravel.log, relative to the top-level folder of your BookStack installation files. For instances installed using our Ubuntu installation scripts, this is commonly located at /var/www/bookstack/storage/logs/laravel.log. If the laravel.log file does not exist the storage/logs directory may not be writable by the server.

In some cases an error may be thrown before or after BookStack handles a request. These will typically show as very plain error pages without any BookStack header bar or styling. In these cases you’ll want to refer to your webserver error logs instead.

• Common Apache error log path on Ubuntu: /var/log/apache2/error.log
• Common Nginx error log path on Ubuntu: /var/log/nginx/error.log

You will likely need privileged access to read these files. For example sudo tail -n 100 /var/log/apache2/error.log.

If using an alternative hosting method, such as docker container, please refer to the documentation provided by that method/container.

Debug View

NOTE: When debugging is enabled it’s possible for visitors to see private credentials used in the BookStack or server configuration. Ensure debugging is only enabled when your instance is not accessible by others. Remember to disable debugging before restoring access.

To enable full error displaying edit the .env file, in the application root directory, and find the line APP_DEBUG=false. Change this to APP_DEBUG=true and the errors will be displayed in full with details of where it occurred. Remember to revert this change once you have found the issue so that the detailed error information is hidden from visitors.

Common Issues & Resolutions

The below lists some of the common issues we see, when it comes to installing & maintaining BookStack, and their usual resolutions.

Blank White Screen on Access

A completely blank screen, when attempting to access your BookStack instance, is commonly due to system/folder permission issues. Check that webserver user has read/write access to the bootstrap/cache, storage and public/uploads folders within your BookStack install. On a common Ubuntu install this can usually be done by running sudo chown -R www-data:www-data bootstrap/cache storage public/uploads from within the BookStack install folder.

If you don’t believe this is due to permissions, and you have nothing in the storage/logs/laravel.log file as detailed above, you’d next want to look at your webserver error logs which can commonly be found within /var/log/nginx/ or /var/logs/apache2/.

No Styles and Large Icons on Access

If the page loads, but shows large icons and appears broken, it generally means the system is generating incorrect paths to some required files or those files do not exist.

• Check that the APP_URL option is set in your .env file and ensure it matches the URL you’re accessing BookStack on (Including the “https://” or “http://” component).
• Check that you’re using the release code branch. If you cloned the project without a branch flag, or downloaded the files from GitHub, you may be using the development branch files which does not include some of these required files.

Failing Database or Auth System Credentials

If you’ve used a password in the .env file which you are sure is correct, but authentication fails for that service, it may be due to special characters being handled different in the .env configuration. Ensure that any such passwords or config options are wrapped in quotes. For example:

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DB_PASSWORD="hunter#2@"

Broken Links or No Images After APP_URL Change

BookStack will store absolute URL paths for some content, such as images, in the database. If you change your base URL for BookStack this can be problematic. This command will essentially run a find & replace operation on all relevant tables in the database. Be sure to take a database backup for running this command.

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# Searches for <oldUrl> and replaces it with <newUrl>
php artisan bookstack:update-url <oldUrl> <newUrl>

# Example:
php artisan bookstack:update-url http://docs.example.com https://demo.bookstackapp.com

Submitting Issues

If you have found the cause of the issue, and it is not an issue with your particular setup, you can submit it on the GitHub issues page. Please include as much information as possible when creating an issue along with steps detailing how to replicate it so the bug can be fixed by a developer.