Find Bug in CI4

Did you use your web browsers developer tools F-12 console to see what is happing?

Did you send the Ajax X-Requested-With header?

I  write sample restful api with angular9 and use chrome and  i  got  error  which i didnot post variables 

And i test with postman with header ajax   and alao got error too 
The data sent but can not  be validate 
After  test every thing i find out data dose not pass to validation class. Add if condation  in validawith() thrn  i  fix problem  

This code ads to validation with request function 
If ($resquest->isAjax()) {

$this->data=$request->getJson(true)
}

Enlightenment  Is  Freedom