[BUG] Light verifier test fails

[drewstone]

running 2 tests
test mock::__construct_runtime_integrity_test::runtime_integrity_tests ... ok
test tests::test_verify_storage_proof_positive_case ... FAILED

failures:

---- tests::test_verify_storage_proof_positive_case stdout ----
thread 'tests::test_verify_storage_proof_positive_case' panicked at 'called `Result::unwrap()` on an `Err` value: Module(ModuleError { index: 3, error: [0, 0, 0, 0], message: Some("CannotVerifyStorageProof") })', pallets/light-verifier/src/tests.rs:55:116
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace