Article ID: 120315, created on Feb 26, 2014, last review on Jun 11, 2016

  • Applies to:
  • Plesk 10.4 for Linux/Unix
  • Plesk Sitebuilder 4.5 for Linux/Unix


The following error appears while opening a site in Web Presence Builder:

Internal error. Please contact the server administrator.

The following error appears in /usr/local/psa/admin/logs/sitebuilder.log:

2012-02-02T10:42:03+04:00      [EMERG] [System]       /sitebuilder/JsonApi/ SB_Facade_Exception_NotFound: Widget is not found. 


Such behavior is considered to be a software issue with ID TP-97809 - widget is not found. The fix will be included in future WPB updates released after 11.0.


Upgrade to the latest version of Web Presence Builder to version 11.0 or higher.

Hotfix for Parallels Web Presence Builder 10.4

Since the issue requires complex manipulations with the database, it is recommended to contact Plesk Technical Support for assistance.

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[Troubleshooting] Cannot publish site with Web Presence Builder: "Unexpected server behavior"

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Please contact the server administrator

cannot open a site in WPB

Widget is not found

Internal error

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