app-manager | Simplifies configuration of Yii application | Web Framework library

I have secured my a Spring application with KeyCloak using Spring Security Adapter, this works fine on my local machine, but when i deployed the WAR on tomcat and try to call the API, i get the following internal server error :

I'm a beginner in Angular 9 and I'm trying to create an application. But I have a few little problems concerning the definition of properties. I hope that someone will be kind enough to help me. First of all, my project looks like that:

My app.component.html is directed to my manager folder with that:

How to instantiate a component programatically and insert it at specified place within template?

Stackblitz: https://stackblitz.com/edit/angular-do71xk

I have a form in the parent component that transfers data to the child component as an input property and the child component has a form that reads this data and prepopulates its form with this data as a way to edit the userprofile. In the line where I try to set the input fields with the transferred data, chrome returns a console error stating that it can't read setValue property of undefined. what could be the wrong with the code?

Here is that code:

On calling UpdateOneAsync, with this wrapper:

In an angular 7 app, I have created a list of managers. When a user clicks on an item, a view with a populated form should be displayed where the user can then update the manager details. While my view is shown, the manager details doesn't show in the form itself and I can see two errors in the console

ERROR Error: formGroup expects a FormGroup instance. Please pass one in.

ERROR TypeError: Cannot read property 'firstname' of null at ManagerViewComponent.push../src/app/manager/manager-view/manager-view.component.ts.ManagerViewComponent.initForm

This is what my code looks like at the moment.

.ts

I have a FormGroup which has three FormControl fields and one FormArray fields as shown in the figure below. The requirement is to take the manager name from user and once add button is pressed, manager details should be displayed in table. In table a remove button is provided, when remove button is pressed manager should be removed form the table and list. When the form is submitted list of managers should be saved. Everything works fine except formArray logic.

I tried to find a solution to this online (followed various links:- https://alligator.io/angular/reactive-forms-formarray-dynamic-fields/, Angular 4 Form FormArray Add a Button to add or delete a form input row), but did not helped much. There is not much material on how to store formArray in formGroup. Please suggest.

Below is my code, please have a look:-

1. manager-create-modal.component.html

I am sending an email to my drivers from my employee site but I am not able to send a driver id with the url link. I get the error:

I,m working on an embedded linux kernel 2.6 device and need to know if previously established socket is still valid or not,Also I can not do this with usual send function and check the returned value,because if I send to the invalid socket descriptor,my application will crash and linux will shut down my process.Is there any other function/suggestion for this ?

EDIT: There are an installed app manager in device and when I try to send to socket descriptor which is not refer to the open socket,app manager will end my application,then if i close a socket connection and try to write to it,my application will be turned off by lower level app-manager.Also I'm using TCP sockets,WBr.