Module development and code questions

I have a module which defines title, body and two custom fields including field text100 within the article content type.

hi, can drupal sync with a chase checking account so that it pulls bank transactions that can later be processed (for example labeled, etc).

The hamburger button is located in the navigation bar and controls the drop-down menu. When clicked, the menu drops down and the hamburger button turns into an X

When you select a menu item, the desired page loads and the X button turns into a hamburger again. But if you click on the page or the navigation bar, the menu disappears, and the button does not rebuild and remains in the X. How can I fix this? 

I have a bootstrap5 template for Drupal 11. In the button of the navigation bar I placed:

This post https://drupal.stackexchange.com/questions/308150/how-can-i-bootstrap-my-site-from-an-external-script contains code to create a node by bootstapping Drupal from a script outside the Drupal site. The code worked with a D9 release but when run on a D9.5.1 site it fails at the code lines setting values and saving the node.

Here is the code that works which will access a specified node...

I have two php scripts within a CRUD module. The code to edit a custom table works with a url  example.com/students100/edit/?id=1, correctly retrieving the database record and placing it in the edit form. This code runs from the edit_student routing entry below: 

I am developing a custom module that has a block plugin. When the plugin runs, it sometimes adds or modifies a node. And when I call the save method, I sometimes (randomly) get an error: 
Call to a member function getStorage() on null. 
If no error occurs, the node is saved successfully.
I am using Drupal 10.4.6.

my code that causes random error: