Package check result: ERROR

Check: examples, Result: ERROR
  Running examples in ‘DistributionIV-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: div
  > ### Title: Distributional IV Model Function
  > ### Aliases: div
  > 
  > ### ** Examples
  > 
  > ## No test: 
  > # Simulate data -------------------------------------------------------------
  > p_Z <- 4
  > p_X <- 2
  > 
  > set.seed(2209)
  > n_train <- 1000
  > Z <- matrix(rnorm(n_train * p_Z, mean = 2), ncol = p_Z)
  > H <- rnorm(n_train, mean = 0, sd = 1.5)
  > X1 <- 0.1 * (Z[, 1] + rnorm(n_train, sd = 0.1)) ^ 2 +
  +  (Z[, 2] + rnorm(n_train, sd = 1)) ^ 2 + H + rnorm(n_train, sd = 0.1)
  > X2 <- 0.5 * (Z[, 3] + Z[, 4]) ^ 2 + 0.1 * H ^ 2 + rnorm(n_train, sd = 0.1)
  > X <- matrix(cbind(X1, X2), ncol = p_X)
  > Y <- 0.5 * X[, 1] + 0.2 * (X[, 2] + rnorm(n_train, sd = 0.2) + H) ^ 2 +
  +  rnorm(n_train, sd = 0.1)
  > 
  > n_test <- n_train
  > Ztest <- matrix(rnorm(n_test * p_Z, mean = 2), ncol = p_Z)
  > Htest <- rnorm(n_test, mean = 0, sd = 1.5)
  > X1test <- 0.1 * (Ztest[, 1] + rnorm(n_test, sd = 0.1)) ^ 2 +
  +  (Ztest[, 2] + rnorm(n_test, sd = 1)) ^ 2 + Htest + rnorm(n_test, sd = 0.1)
  > X2test <- 0.5 * (Ztest[, 3] + Ztest[, 4]) ^ 2 + 0.1 * Htest ^ 2 + rnorm(n_test, sd = 0.1)
  > Xtest <- matrix(cbind(X1test, X2test), ncol = p_X)
  > Ytest <- 0.5 * Xtest[, 1] + 0.2 * (Xtest[, 2] + rnorm(n_test, sd = 0.2) + Htest) ^ 2 +
  +  rnorm(n_test, sd = 0.1)
  > 
  > # Fit generativeIV model ----------------------------------------------------
  > # Consider increasing number of epochs. Here: num_epochs = 100 for fast computation only.
  > DIV_model <- div(Z = Z, X = X, Y = Y, num_epochs = 100)
  Torch dependencies are missing. Please install them using torch::install_torch().
  Error in (function (size, options, memory_format)  : 
    Lantern is not loaded. Please use `install_torch()` to install additional dependencies.
  Calls: div ... call_c_function -> do_call -> do.call -> <Anonymous>
  Execution halted