Found the following significant warnings:

  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in abs(beta) - tau * lambda : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in abs(beta) - tau * lambda : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in tau0 * c(gradf0) : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in (x1hat - x0)/tau0 : Recycling array of length 1 in vector-array arithmetic is deprecated.
Deprecated functions may be defunct as soon as of the next release of
R.
See ?Deprecated.