Request method 'GET' not supported There was an unexpected error (type=Method Not Allowed, status=405) - spring-boot

Question

My scenario is as follows:
There are several entities, and I need to send custom designed email for each entity "by Id". For example, I am trying to send the email by this URL for "babs" entity:
http://localhost:8081/api/v1/test/babss/sendmail/b1d0c331-35ac-430d-87ca-1718b06351c3
Sample entity for BaBS:
import com.fasterxml.jackson.annotation.JsonBackReference;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.*;
import javax.persistence.*;
import java.util.UUID;
#Getter
#Setter
#NoArgsConstructor
#AllArgsConstructor
#Builder
#Entity
#Table(name = "babs")
public class BaBs {
#Id
#Column(name = "id")
private UUID id;
#Column(name = "accountCode")
private String accountCode;
#Column(name = "accountName")
private String accountName;
#Column(name = "eMail")
private String eMail;
#ManyToOne
#JsonBackReference
#JoinColumn(name = "accountid")
private Account account;
}
email Sending Service
import gokhan.mutabakatcore.models.BaBs;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
#Component
public class SentBaBsEmail {
#Autowired
private JavaMailSender sender;
public HttpStatus mailBaBs(BaBs baBs) throws MailException {
SimpleMailMessage mail = new SimpleMailMessage();
mail.setTo(baBs.getEMail());
mail.setSubject("Trial Mail for Sending BaBs");
mail.setText("Normally Details from Object ");
sender.send(mail);
System.out.println("eMail sent");
return HttpStatus.GONE;
}
}
Corresponding part of BaBS Controller
import gokhan.mutabakatcore.models.BaBs;
import gokhan.mutabakatcore.services.BaBsService;
import gokhan.mutabakatcore.utils.SentBaBsEmail;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.validation.Valid;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.UUID;
import java.util.function.Function;
#RestController
#RequestMapping("/api/v1/test/babss")
public class BaBsController {
private final BaBsService baBsService;
public BaBsController(BaBsService baBsService) {
this.baBsService = baBsService;
}
#Autowired
SentBaBsEmail baBsEmail;
#RequestMapping(value = "/sendmail/{Id}", method = { RequestMethod.GET, RequestMethod.POST })
public ResponseEntity<?> eMailBaBsByCustomerId(#PathVariable("Id") UUID uuid){
try{
if (!baBsService.findById(uuid).equals(Optional.empty())){
// Converts Optional Object to Normal Object
BaBs baBs = (BaBs) toList(baBsService.findById(uuid));
baBsEmail.mailBaBs(baBs);
return new ResponseEntity(baBs ,HttpStatus.CREATED);
}
return new ResponseEntity<>("Unrecorded BaBS!", HttpStatus.BAD_REQUEST);
} catch (Exception e) {
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
}
}
}
Application.properties Mailing part
#SMTP Email Properties
spring.mail.host=mail.xyz.com
spring.mail.port=587
spring.mail.username=info#xyz.com
spring.mail.password=password
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.starttls.enable=true
spring.mail.properties.mail.starttls.required=true
Relavant POM.xml dependencies
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
The error I got:
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sat Aug 06 08:39:31 EET 2022
There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'GET' not supported
org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
I'll appreciate if you can show me the issue...