Model: Cyan (Acer Chromebook R11)

Recovery image for Cyan is still M54, though the latest version for this model is 55.0.2883.105 (8872.76.0).

https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.json

  {
    "channel": "stable-channel",
    "desc": "",
    "file": "chromeos_8743.85.0_cyan_recovery_stable-channel_mp-v3.bin",
    "filesize": 2279571456,
    "hwidmatch": "^CYAN .*",
    "manufacturer": "Acer",
    "md5": "c9d749d8facedd379b8d50596459813b",
    "model": "Acer Chromebook R11 (CB5-132T / C738T)",
    "name": "Acer Chromebook R11 (CB5-132T / C738T)",
    "photourl": "",
    "sha1": "f740bb628e91eee4cca85d57e2b30345ad75087a",
    "sku": "",
    "url": "https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_8743.85.0_cyan_recovery_stable-channel_mp-v3.bin.zip",
    "version": "8743.85.0",
    "zipfilesize": 1079083160,
    "hwids": []
  },

Please update the recovery image to latest version.