URL         = "https://b24-ar17wx.bitrix24.by/rest/1/f2ppp8uucc891111/";
    ChatID      = "450";
    File        = "https://openintegrations.dev/test_data/document.docx"; // Binary Data, URL or path to file
    Description = "Very important file";

    Directory = OPI_Bitrix24.GetChatFilesFolder(URL, ChatID);
    FolderID  = Directory["result"]["ID"];

    UploadedFile = OPI_Bitrix24.UploadFileToFolder(URL, "Imortant doc.docx", File, FolderID);
    FileID       = UploadedFile["result"]["ID"];

    Result = OPI_Bitrix24.SendFile(URL, ChatID, FileID, Description);

    URL    = "b24-ar17wx.bitrix24.by";
    Token  = "fe3fa966006e9f06006b12e400000001000...";
    ChatID = "452";

    Directory = OPI_Bitrix24.GetChatFilesFolder(URL, ChatID, Token);
    FolderID  = Directory["result"]["ID"];

    UploadedFile = OPI_Bitrix24.UploadFileToFolder(URL, "Imortant doc.docx", File, FolderID, Token);
    FileID       = UploadedFile["result"]["ID"];

    Result = OPI_Bitrix24.SendFile(URL, ChatID, FileID, Description, Token);