CondaHTTPError: HTTP 520 CONNECTION FAILED for url <https://conda.anaconda.org/konstantinstadler/noarch/current_repodata.json> Elapsed: 00:36.560854 CF-RAY: 8d3163756de31590-SJC A remote server error occurred when trying to retrieve this URL. A 500-type error (e.g. 500, 501, 502, 503, etc.) indicates the server failed to fulfill a valid request. The problem may be spurious, and will resolve itself if you try your request again. If the problem persists, consider notifying the maintainer of the remote server.