Bug in Version 2.14.2 (no replies)

Hi,

the new version 2.14.2 has a new bug:

WARNING: /www/htdocs/.../piwik/plugins/Diagnostics/Diagnostic/RecommendedFunctionsCheck.php(73): Notice - Undefined index: shell_exec - Piwik 2.14.2 - Please report this message in the Piwik forums: [forum.piwik.org] (please do a search first as it might have been reported already)

What should I do as solution?

Thanks for help
mustermann