Error "expected str, bytes or os.PathLike object, not list" for harmony request

[hazemmahmoudnasa]

https://harmony.uat.earthdata.nasa.gov/C1256588789-ASDC_DEV2/ogc-api-coverages/1.0.0/collections/parameter_vars/coverage/rangeset?forceAsync=true&granuleId=G1269242639-ASDC_DEV2%2CG1269374306-ASDC_DEV2&variable=ztoa_net_all_mon&skipPreview=true

I just tested net2cog on UAT and came across this failure: https://harmony.uat.earthdata.nasa.gov/logs/7b216437-8877-4e87-b0ab-a248659ed9d3/4833911
"ERROR:root:expected str, bytes or os.PathLike object, not list\r\nTraceback (most recent call last):\r\n File "/home/dockeruser/.local/lib/python3.10/site-packages/harmony/cli.py", line 244, in _invoke\r\n (out_message, stac_output) = adapter.invoke()\r\n File "/home/dockeruser/.local/lib/python3.10/site-packages/harmony/adapter.py", line 121, in invoke\r\n return (self.message, self._process_catalog_recursive(self.catalog))\r\n File "/home/dockeruser/.local/lib/python3.10/site-packages/harmony/adapter.py", line 186, in _process_catalog_recursive\r\n output_item = self.process_item(item.clone(), source)\r\n File "/worker/net2cog/netcdf_convert_harmony.py", line 109, in process_item\r\n staged_filename = os.path.basename(cog_generated)\r\n File "/usr/local/lib/python3.10/posixpath.py", line 142, in basename\r\n p = os.fspath(p)\r\nTypeError: expected str, bytes or os.PathLike object, not list\r\n",
"{"message": "timing./home/dockeruser/.local/bin/net2cog_harmony.end", "user": "hazem.mahmoud88", "requestId": "7b216437-8877-4e87-b0ab-a248659ed9d3", "durationMs": 60681, "timestamp": "2024-09-17T16:02:20.789568Z", "level": "INFO", "application": "/home/dockeruser/.local/bin/net2cog_harmony"}\r\nTraceback (most recent call last):\r\n File "/home/dockeruser/.local/bin/net2cog_harmony", line 8, in \u003Cmodule\u003E\r\n",
" sys.exit(main())\r\n File "/worker/net2cog/netcdf_convert_harmony.py", line 144, in main\r\n",

[D-Auty]

I'm pretty sure this is the result of various issues in handling different collections (see related issues) all "upstream" from the eventual exception. In these cases, the "list" object in question is None - intended to be the list of output files. When there is no output file, the exception is raised.