Exception in Tkinter callback Traceback (most recent call last): File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\connectionpool.py", line 603, in urlopen File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\connectionpool.py", line 344, in _make_request File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\connectionpool.py", line 843, in _validate_conn File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\connection.py", line 370, in connect File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\util\ssl_.py", line 355, in ssl_wrap_socket File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\ssl.py", line 407, in wrap_socket File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\ssl.py", line 814, in __init__ File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\ssl.py", line 1068, in do_handshake File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\ssl.py", line 689, in do_handshake ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\requests\adapters.py", line 449, in send File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\connectionpool.py", line 641, in urlopen File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\urllib3\util\retry.py", line 399, in increment urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /jDeters-USACE/Antecedent-Precipitation-Tool/master/v/main_ex (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),)) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\tkinter\__init__.py", line 1702, in __call__ File "D:\Code\Python\WinPythonARC_dev_EPA\arc\ula_window.py", line 135, in click_accept_button File "D:\Code\Python\WinPythonARC_dev_EPA\arc\get_all.py", line 236, in main File "D:\Code\Python\WinPythonARC_dev_EPA\arc\get_all.py", line 62, in ensure_main_exe File "D:\Code\Python\WinPythonARC_dev_EPA\arc\get_files.py", line 208, in get_only_newer_version File "D:\Code\Python\WinPythonARC_dev_EPA\arc\get_files.py", line 97, in parse_version File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\requests\api.py", line 75, in get File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\requests\api.py", line 60, in request File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\requests\sessions.py", line 533, in request File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\requests\sessions.py", line 646, in send File "D:\Code\Python\WinPythonARC_dev_EPA\WinPythonZero32\python-3.6.5\lib\site-packages\requests\adapters.py", line 514, in send requests.exceptions.SSLError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /jDeters-USACE/Antecedent-Precipitation-Tool/master/v/main_ex (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))