migxLoopCollection don't displays data from MigxDb Modx3

my migxLoopColletion:
[[!migxLoopCollection?
&packageName=testimonials
&className=Testimonials\Model\Testimonials
&tpl=tempTestimonials
]]
error logs :

Change the property to &classname. (The n is a lower case letter!)

(Also, you probably don’t need the &packageName property.)

i try your method, but don’t work(((

What’s your schema?
Is there a file core/components/testimonials/bootstrap.php with $modx->addPackage(...) to load the package?