EmailValidation | NET class for validating email addresses | Validation library

My root project folder is:

I am trying to validate a form. When the page is refreshed and I click on submit button then only the last element's error is generated, it should generate error for every input according to validation.
Screenshot of form issue
Form validation is working perfect with onChange event. But it doesn't work fine when page is refreshed and I click on submit button without putting values to inputs.

When I click on "Submit" button, It generates an object {message: 'Required'}, In this object, only message key is generated. It should generate object with all input names like {name: 'Required', email: 'Required', message: 'Required'}.

Here is my code:

How can I validate the email inside view model combining that two codes using combine?

This is inside my RegisterViewModel

I am currently using two components, and implemented react Route on both. But when I click the parent component, ViewAll.js, I cannot fetch the values from my mock json server api and this error shows:

TypeError: Cannot read properties of undefined (reading 'map') ViewAll

But I can see the values from the json server displaying on the child component, which is the InputForm.js

Here is my code snippet:

InputForm.js

I am creating a react app and getting all data from API calls. I have set data into an array and need to display them one by one inside the div tag.

My data set is like below.

I use SAFE stack. For email validation I imported EmailValidation via paket. Code compiles and runs; I can even peek into EmailValidation sources via debugger. At run time I face an exception:

This is my code. i have to validate userno & email while submit form. But userno exist is conditional based on user Type and emailvalidation common for all users..

THis is code

state isn't reflecting change immediately causing me to have to fun onSubmit twice to get the form to submit

Currently I am using Firebase Email Link Authentication for iOS, my first authentication method sendsigninlink:toEmail works and sends the email to email from user sign up input. But I cannot currently capture the email input locally to use in another view controller for another function that is asynchronous. I try setting the email value in the button IBAction method here.