OK getting back to looking at my website

Have got two off canvas menus working (1. for tools and 2. for main menu)

However I can only get the Main menu to display the first level of menu items.

Have you any suggestions for getting the sub menu items to display ?
N.B. the menu item with sub menu items does display a down arrow, but trying to click on it only display the item at the main menu level.

see

https://siteupdate.vedicmaths.org/index.php

If you want to see where I have currently got to

Is it possible to embed the contents of a text file stored in a subdirectory of the webserver ?

Hello, it doesn't seem to work, there are more the 4000 k2 articles and like a 120 are imported.
What is wrong?
That imported page keeps on saying this, but nothing further is happening...

I found a few bugs:

1. The "radio buttons" extra field doesn't transfer the values ​​in the additional field, e.g., "yes" or "no," and only enters certain values ​​into the #__fields_values ​​database.

2. The "textarea" extra field with the "Use editor" option checked converts to "textarea" when it should be "editor."

3. In K2, the extra field group is assigned in the category. In Joomla Articles, the category is assigned in the extra field. It would be nice if this were automatically completed. A checkbox could be added if someone doesn't want this option.

I have a module about a place in a Spanish-speaking country, but some comments in English appear first, followed by some in Spanish. The module is set to Spanish. How can I make only the Spanish comments appear?