URL    = "https://b24-ar17wx.bitrix24.by/rest/1/h0m...";
    ChatID = "1846";

    Image = "https://api.athenaeum.digital/test_data/picture2.jpg";

    Result = OPI_Bitrix24.ChangeChatPicture(URL, ChatID, Image);

    URL    = "b24-ar17wx.bitrix24.by";
    Token  = "b4c59767006e9f06006b12e400000001000...";
    ChatID = "1848";

    Result = OPI_Bitrix24.ChangeChatPicture(URL, ChatID, Image, Token);