Smartthings integegration with old V1 Hub that I have had for years and Nginx Reverse Proxy

Configuration
1

I believe I have HASS setup the right way. I have my on SSL cert but i use NGINX reverse proxy to access hass on https://www.mydomain.org it runs over 443.

base_url points to the base of my hass which is accessible from the internet
I am getting the message below when I put in my token and try to connect.

SmartThings could not validate the endpoint configured in base_url. Please review the component requirements.

This is in the log

[homeassistant.components.smartthings.config_flow] API error setting up the SmartApp: {‘requestId’: ‘A124122A-9A66-4531-8AF9-04F473FE4CA8’, ‘error’: {‘code’: ‘ConstraintViolationError’, ‘message’: ‘The request is malformed.’, ‘details’: [{‘code’: ‘TargetTimeoutError’, ‘target’: ‘https://www.MYDOMAIN.org/api/webhook/4d4d46e3ed22b15e57c1bd7f621fe81150961778738b2b8469a5234094471b0f’, ‘message’: ‘Upstream target timed out’, ‘details’: []}]}}

2

i have the same issue. have you found a solution or a workaround?