wpsnoop Function is_staff() conflicts found in 1 plugin

A php function called is_staff() is used in 1 wordpress plugin/theme and could produce a potential conflict if the wrong combination of themes and plugins is used on your site.

To prevent this from happening developers are encouraged to use namespaces and scopes that isolate their functions from colliding with other functions but this is not always done correctly.

We hope this reference helps you to find PHP Fatal error: Cannot redeclare is_staff()

The following plugin registers a function called is_staff():

Plugin
WP Club Manager