No servers currently available when using local json list

[cubednet135]

When I try to run a speedtest with my local json server list, I get a message that no server is currently available.
$ librespeed-cli --local-json speedtestservers.json Using local JSON server list: speedtestservers.json Selecting the fastest server based on ping No server is currently available, please try again later.
I have verified that all of these servers are online and I can run a speedtest with a browser.
JSON list:

[
  {
    "name": "Server1",
    "server": "https://(server1)/speedtest/",
    "dlURL": "garbage.php",
    "ulURL": "empty.php",
    "pingURL": "empty.php",
    "getIPURL": "getIP.php"
  },
  {
    "name": "Server2",
    "server": "https://(server2)/speedtest/",
    "dlURL": "garbage.php",
    "ulURL": "empty.php",
    "pingURL": "empty.php",
    "getIPURL": "getIP.php"
  },
  {
    "name": "Server3",
    "server": "http://(server3)/speedtest/",
    "dlURL": "garbage.php",
    "ulURL": "empty.php",
    "pingURL": "empty.php",
    "getIPURL": "getIP.php"
  }
]

[cubednet135]

Solved by adding backend directory for dlURL, ulURL, pingURL, and getIPURL

[
  {
    "name": "Server1",
    "server": "https://(server1)/speedtest/",
    "dlURL": "backend/garbage.php",
    "ulURL": "backend/empty.php",
    "pingURL": "backend/empty.php",
    "getIPURL": "backend/getIP.php"
  },
  {
    "name": "Server2",
    "server": "https://(server2)/speedtest/",
    "dlURL": "backend/garbage.php",
    "ulURL": "backend/empty.php",
    "pingURL": "backend/empty.php",
    "getIPURL": "backend/getIP.php"
  },
  {
    "name": "Server3",
    "server": "http://(server3)/speedtest/",
    "dlURL": "backend/garbage.php",
    "ulURL": "backend/empty.php",
    "pingURL": "backend/empty.php",
    "getIPURL": "backend/getIP.php"
  }
]