StockTicker | resizable widget that shows your financial portfolio | Widget library

I create the shiny app below creating function TLH and using it as a source file. In the main body I have a verbatimTextOutput() and datatable(). The strange thing is that when I delete the line verbatimTextOutput("oResults"), which creates the text the datatable is also hidden. I cannot understand why this happens but I want to use the TLH.r file to create the app and not put everything inside the app.r file since my actual app is more complex.

app.r

I have a shiny app below with 3 different tabs. I want each tab to have its own sidebar and I did this using conditionalPanel(). The first tab though (InsiderTraining) has 2 more tabs inside it (Tab1,Tab2) which I also want to have separated sidebars.

I have the shiny app below with 3 different tabs, a sidebar and a right sidebar. I would like every time that I move to another tab the content of the right sidebar to change and display different widgets. In the third though named "Tax Loss Harvesting" I want to add a controlbarMenu(). How can I make it be displayed only when Im in the third tab?

I have the shiny app below with 3 different tabs, a sidebar and a right sidebar. I would like every time that I move to another tab the content of the two sidebars to change and display different widgets. In the commeted -out lines you can see the different widgets that I want to display.

I've been trying to build a 3D pandas dataframe of the following format:

Each 'panel' is for a specific stock and includes the open, close, low and high for that stock for many points in time Multiple panel are placed together to form the 3D dataframe (previously I think I would have called these panels, but it looks like panels have been depreciated?).

Here's what I'm currently trying:

this is my data structure:

I am trying to get data from Yahoo Finance on Excel on Mac.

As far as I know, the usual approach to get web data on Mac is WebQuery. However, sometimes it works without issues, sometimes throws an error 1004 for the same set of tickers it worked before without issue. Text of the error: "Microsoft Excel cannot access the file %link%. There are several possible reasons:"

I have no clue why does that happen. The only suggestion is because the URL does not contain a cookie / crumb Yahoo needs.

For testing purposes, I used WinHttpRequest on Windows. It works - Excel successfully gets the data. There's an alternative on Mac - Tim Hall's WebHelpers. I was able to get the cookie and the crumb on Mac with this great set of tools. But when I try downloading the CSV from Yahoo the response.Content has this string: {"finance":{"result":null,"error":{"code":"Not Acceptable","description":"HTTP 406 Not Acceptable"}}}.

Generally, I have several questions:

1. Is there a way to add a cookie to the WebQuery approach? Still, I am not sure if that works and helps to evade the error.
2. Why does Response return Error 406? Particularly this code snippet:

I am randomly getting the following error on first call to Apache TomCat 8.5.51 after the service restart. The error automatically goes away after sometime which makes it very hard to debug.

What could be the reason for it?

Error Log:

pom.xml