[5.x] Return validation error when AllowedFile is not an UploadedFile #11535
+5
−1
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This PR updates the isAllowedExtension method in AllowedFile validation rule to handle a value that isn't an UploadedFile being passed to it.
I couldn't see where to put a test - happy to add one if you can point me in the right direction?
Closes #11525