fix bug #2585

fix bug 2585 #2585

Author: sahakpetros

gpytorch/mlls/leave_one_out_pseudo_likelihood.py

@@ -54,6 +54,7 @@ def forward(self, function_dist: MultivariateNormal, target: Tensor, *params) ->
         :param torch.Tensor target: :math:`\mathbf y` The target values
         :param dict kwargs: Additional arguments to pass to the likelihood's forward function.
         """
+        target = target.flatten()
         output = self.likelihood(function_dist, *params)
         m, L = output.mean, output.lazy_covariance_matrix.cholesky(upper=False)
         m = m.reshape(*target.shape)