Message "Error read wbs.xml file"

After installation or during operation of WebAsyst the main page located at the WebAsyst installation URL may turn blank. The source code of that page can in some cases contain the following diagnostic message:

Error read wbs.xml file.

This message means that WebAsyst configuration file kernel/wbs.xml is nor readable by the web server. Such a failure can have several causes listed below:

1. The file is corrupted or is missing.
2. Permissions of the file do not allow the web server to read its contents.

If file kernel/wbs.xml is missing or corrupted, restore it from a backup. If the file is not readable by the web server assign wider access permissions to it.