Runtime error (PythonException) when installing new Ladybug


I am receiving following error when installing newest Ladybug Tools 1.1.0 for Rhino 7:

Runtime error (PythonException): Download failed with the error:
The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

line 66, in download_file_by_name, “”
line 126, in script

So I checked the code.

The code around line 66 states:

  • attempt to download the file

client = System.Net.WebClient()
    client.DownloadFile(url, file_path)
except Exception as e:
    raise Exception(' Download failed with the error:\n{}'.format(e))
return file_path*

Ok, therefore I downloaded the packages manually and put them into path:

Does not work.

Line 126, however, is about:

  • download an unzip the python build

python_dir = os.path.join(lb_folder, 'python')
zip_file = None
if not os.path.isdir(python_dir):
    if == 'nt':
        if not os.path.isdir(python_dir):
            zip_file = download_file_by_name(win_python_url, lb_folder, '')
            unzip_file(zip_file, lb_folder)
        if not os.path.isdir(python_dir):
            zip_file = download_file_by_name(mac_python_url, lb_folder, '')*

And this bugs me. The installation file has a problem with Pytthon, which is built in into Rhino 7?

Please help me solve that issue.

I tried to start the app as the administrator - did not work.