No Meaningful Fit Was Possible

[reyniersquillace]

Hi,
I'm trying to run the first example on the elliptical isophote fit, replacing the tutorial url of M51 with a FITS cutout from PanStarrs in the i-band. When I run the code line by line, it gets as far as:
isolist = ellipse.fit_image()
at which point it tells me no meaningful fit is possible. I have selected the default values such that the guess is right at the center of the galaxy, resized the image, tried different images off of PanStarrs, etc. but I keep getting this error. When the galaxy takes up most of my image, the image is about 150 pixels across.

Here is a reproducible example:

from astropy.io import fits
from astropy.utils.data import download_file

url = 'http://ps1images.stsci.edu/cgi-bin/fitscut.cgi?red=/rings.v3.skycell/2594/022/rings.v3.skycell.2594.022.stk.i.unconv.fits&format=fits&x=310.198000&y=72.882500&size=150&wcs=1&imagename=cutout_rings.v3.skycell.2594.022.stk.i.unconv.fits'
path = download_file(url)
hdu = fits.open(path)
data = hdu[0].data
hdu.close()

from photutils.isophote import Ellipse

ellipse = Ellipse(data)

isolist = ellipse.fit_image()

This gives this error:

WARNING: No meaningful fit was possible. [photutils.isophote.ellipse]

[reyniersquillace]

This was using version 1.4.1(dev) and then switching to 1.4.0, with the same error on both. I am on Windows using VS Code with a WSL Ubuntu environment.