https://block.io,block.io,https://github.com/igorbarinov/awesome-bitcoin#readme,Bitcoin error: <HTTPError 503: 'Service Temporarily Unavailable'> | reason: Service Temporarily Unavailable
https://river.com/learn,River Learn,https://github.com/igorbarinov/awesome-bitcoin#readme,Bitcoin error: <HTTPError 308: 'Permanent Redirect'> | reason: Permanent Redirect
https://bitkit.live,Bitkit,https://github.com/igorbarinov/awesome-bitcoin#readme,Bitcoin error: URLError(gaierror(8, 'nodename nor servname provided, or not known')) | reason: [Errno 8] nodename nor servname provided, or not known