Upgrading of Parallels Plesk Panel to version 11.5 failed. The following error is shown when enter login and password at
500 Internal server error
Enabling display_errors in
%plesk_dir%\\admin\\php.ini we get:
PHP Warning: include_once(SB\\Application\\Api.php): failed to open stream: No such file or directory
Where %plesk_dir% is path to Plesk installation directory (e.g.,
C:\\Program Files (x86)\\Parallels\\Plesk ).
Missing files after failed upgrade.
There is no required SB\Application\Api.php file under
You can receive missing files from msi package from the autoinstaller repository and place it to required directory.
Use details from KB How to restore files from the plesk.msi package to get instructions for extracting files from msi package.
Alternatively you may copy missing files from the other server with the same OS and Plesk version.