must be an instance of string, string given

[unkwntech]

So i'm getting this error which seem entirly backwords, any ideas whats going on?

Error: Catchable fatal error:  Argument 1 passed to siteMS::logger() must be an instance of string, string given

Offending line:

$this->logger('Invalid page name requested', 0, 0, $pageName);

Definition of logger:

private function logger(string $message, int $line, string $file, string $extra=null)
 {...}

[premiso]

3rd parameter is set as an int 0 instead of a string of $file.

[unkwntech]

That is true but still does not explain the error as it states argument 1, is this just a PHP bug?