Slack API error on too many blocks in one post

[bbaga]

{
  "ok" : false,
  "error" : "invalid_blocks",
  "errors" : [ "no more than 50 items allowed [json-pointer:/blocks]" ],
  "warning" : "missing_charset",
  "response_metadata" : {
    "messages" : [ "[ERROR] no more than 50 items allowed [json-pointer:/blocks]" ],
    "warnings" : [ "missing_charset" ]
  }
}