Test Enumerator thing

i just fineshed trying to use pixel perfect camera but when i went to play there was an error saying :

Library\PackageCache\com.unity.test-framework@1.1.14\UnityEngine.TestRunner\NUnitExtentions\Commands\EnumerableTestMethod.cs(31,58): error CS0246: The type or namespace name ‘TestEnumerator’ could not be found (are you missing a using directive or assembely reference?)

plz help!

oh nvm i just refreshed it