wpsnoop Function wp_criticalcss_php_upgrade_notice() conflicts found in 1 plugin

A php function called wp_criticalcss_php_upgrade_notice() 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 wp_criticalcss_php_upgrade_notice()

The following plugin registers a function called wp_criticalcss_php_upgrade_notice():

Plugin
WP Critical CSS