wpsnoop Function apppage_backend() conflicts found in plugins 2 themes

A php function called apppage_backend() is used in 2 wordpress plugins/themes 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 apppage_backend()

The following 2 themes register a function called apppage_backend():

Theme
AppPage
LandingPageBuilder