Package check result: ERROR

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Tomasz Kalinowski <tomasz.kalinowski@rstudio.com>’
  
  Found the following (possibly) invalid URLs:
    URL: https://en.wikipedia.org/wiki/Location-scale_family
      From: man/tfd_cauchy.Rd
            man/tfd_doublesided_maxwell.Rd
            man/tfd_gumbel.Rd
            man/tfd_johnson_s_u.Rd
            man/tfd_laplace.Rd
            man/tfd_logistic.Rd
            man/tfd_multivariate_normal_diag.Rd
            man/tfd_multivariate_normal_diag_plus_low_rank.Rd
            man/tfd_multivariate_normal_full_covariance.Rd
            man/tfd_multivariate_normal_linear_operator.Rd
            man/tfd_multivariate_normal_tri_l.Rd
            man/tfd_multivariate_student_t_linear_operator.Rd
            man/tfd_normal.Rd
            man/tfd_student_t.Rd
            man/tfd_vector_exponential_diag.Rd
            man/tfd_vector_exponential_linear_operator.Rd
            man/tfd_vector_laplace_linear_operator.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Low-discrepancy_sequence
      From: man/mcmc_sample_halton_sequence.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Multivariate_gamma_function
      From: man/tfd_wishart.Rd
            man/tfd_wishart_linear_operator.Rd
            man/tfd_wishart_tri_l.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Normal_distribution
      From: man/tfb_normal_cdf.Rd
            man/tfd_probit_bernoulli.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Numerical_integration
      From: man/tfd_poisson_log_normal_quadrature_compound.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Parallel_tempering
      From: man/mcmc_replica_exchange_mc.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Power_transform
      From: man/tfb_power_transform.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Probit_model
      From: man/tfd_probit_bernoulli.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Quasi-Monte_Carlo_method#Randomization_of_quasi-Monte_Carlo
      From: man/mcmc_sample_halton_sequence.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Rayleigh_distribution
      From: man/tfb_rayleigh_cdf.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Riemann_zeta_function
      From: man/tfd_zipf.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Shifted_Gompertz_distribution
      From: man/tfb_shifted_gompertz_cdf.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Simplex
      From: man/tfd_dirichlet.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Softmax_function
      From: man/tfb_softmax_centered.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Triangular_distribution
      From: man/tfd_pert.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Truncated_normal_distribution
      From: man/tfd_truncated_normal.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Variational_Bayesian_methods
      From: man/tfd_vector_diffeomixture.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://en.wikipedia.org/wiki/Weibull_distribution
      From: man/tfb_weibull.Rd
            man/tfb_weibull_cdf.Rd
      Status: 429
      Message: Too Many Requests
    URL: https://www.semanticscholar.org/paper/OTHER-MODIFICATIONS-Karpathy/2e77b99e8bd10b9e4551a780c0bde9dd10fdbe9b?p2df
      From: man/tfd_pixel_cnn.Rd
      Status: 202
      Message: Accepted

Check: examples, Result: ERROR
  Running examples in ‘tfprobability-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: layer_independent_normal
  > ### Title: An independent Normal Keras layer.
  > ### Aliases: layer_independent_normal
  > 
  > ### ** Examples
  > 
  > ## No test: 
  > library(keras)
  The keras package is deprecated. Use the keras3 package instead.
  > input_shape <- c(28, 28, 1)
  > encoded_shape <- 2
  > n <- 2
  > model <- keras_model_sequential(
  +   list(
  +     layer_input(shape = input_shape),
  +     layer_flatten(),
  +     layer_dense(units = n),
  +     layer_dense(units = params_size_independent_normal(encoded_shape)),
  +     layer_independent_normal(event_shape = encoded_shape)
  +     )
  +   )
  To use legacy Keras via py_require(), call py_require_legacy_keras() at the start of the R session.
  Error: Valid installation of TensorFlow not found.
  
  Python environments searched for 'tensorflow' package:
   /usr/bin/python3.13
  
  Python exception encountered:
   Traceback (most recent call last):
    File "/home/hornik/lib/R/Library/4.6/x86_64-linux-gnu/reticulate/python/rpytools/loader.py", line 122, in _find_and_load_hook
      return _run_hook(name, _hook)
    File "/home/hornik/lib/R/Library/4.6/x86_64-linux-gnu/reticulate/python/rpytools/loader.py", line 96, in _run_hook
      module = hook()
    File "/home/hornik/lib/R/Library/4.6/x86_64-linux-gnu/reticulate/python/rpytools/loader.py", line 120, in _hook
      return _find_and_load(name, import_)
  ModuleNotFoundError: No module named 'tensorflow'
  
  
  You can install TensorFlow using the install_tensorflow() function.
  Execution halted