ValueError in server calling to cas()->isAuthenticated()

[darece]

I don't undersand what's happening, I get this error page every time:

My middleware that produces this error is:

public function handle(Request $request, Closure $next)
    {
        dd(cas()->isAuthenticated()); # This line produces the crash

Notice that the url for security reasons has been hidden. The web.php route is:

Route::get('/test', function() {
    phpinfo();
})->middleware('phpCasAuth');

Notice too that even I force the url without ticket QS variable, is always redirected to this ticket QS url variable:

[darece]

Solved! the problem was a simple missmatch configuration in cas.php config file, the CAS_ENABLED_SAML must be set to empty string due our phpCAS server validator doesn't uses this feature, so was a fail of mine!

Thanks!