See the status code yourself
curl -sS -o /dev/null -w '%{http_code}\n' https://example.com/pathAdd -v to see the full request and response headers.
HTTP 505 HTTP Version Not Supported
The server does not support the HTTP version used.
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- Code
505- Name
- HTTP Version Not Supported
- Category
- 5xx — Server error
How to fix / what to check
Check the client or proxy protocol configuration.