Template might not exists

Im trying to call restapi and im getting error

package czajka.piotr.restapi.viewcontroller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class FieldViewController {

    @RequestMapping("/view-fields")
    public String viewFields()
    {
        return "view-fields";
    }
}

org.thymeleaf.exceptions.TemplateInputException: Error resolving template [view-fields], template might not exist or might not be accessible by any of the configured Template Resolvers at org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:869) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE] at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:607) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE] at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:366) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE] at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:190) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1400) ~ etc

properties

spring.jpa.hibernate.ddl-auto=none
spring.datasource.url=jdbc:mysql://localhost:3306/serverdb?useUnicode=true&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=12345678
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
server.port=8081
spring.thymeleaf.prefix=classpath:templates/
spring.thymeleaf.suffix=.html
spring.thymeleaf.mode=HTML5

Maybe this would help

Answer

According to your ss you have named the template as field-view.html but in controller you are returning view-fields.

Your code :

package czajka.piotr.restapi.viewcontroller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class FieldViewController {

    @RequestMapping("/view-fields")
    public String viewFields()
    {
        return "field-view";
    }
}

Btw when you are making rest api you should use @RestController annotation instead of @Controller. Actually Controller will look for temples and RestController will return actual string or you can write html code too.