PersistentStateComponent getState not called

problem

when i start up plugin ,FastRequestComponent.getState not called, why?

javacode

@State(name = "fastRequest", storages = {@Storage("fastRequest.xml")})
public class FastRequestComponent implements PersistentStateComponent<FastRequestConfiguration> {

    private FastRequestConfiguration config;

    @Nullable
    @Override
    public FastRequestConfiguration getState() {
        if (config == null) {
            config = new FastRequestConfiguration();
            List<String> projectList = new ArrayList<>();
            List<String> envList = new ArrayList<>();
            List<NameGroup> dataList = new ArrayList<>();
            projectList.add("base");
            projectList.add("marketing");
            envList.add("dev");
            envList.add("test");
            dataList.add(new NameGroup("base",Lists.newArrayList(new HostGroup("dev","aaa"),new HostGroup("test","bbb"))));
            dataList.add(new NameGroup("marketing",Lists.newArrayList(new HostGroup("dev","xxx"),new HostGroup("test","yyy"))));
            config.setDataList(dataList);
            config.setEnvList(envList);
            config.setProjectList(projectList);
        }
        return config;
    }

    public static FastRequestComponent getInstance() {
        return ServiceManager.getService(FastRequestComponent.class);
    }

    @Override
    public void loadState(@NotNull FastRequestConfiguration state) {
        XmlSerializerUtil.copyBean(state, Objects.requireNonNull(getState()));
    }

}

public class FastRequestConfiguration implements Serializable {
    private List<String> projectList;
    private List<String> envList;
    private List<NameGroup> dataList;


    public List<String> getProjectList() {
        return projectList;
    }

    public void setProjectList(List<String> projectList) {
        this.projectList = projectList;
    }

    public List<String> getEnvList() {
        return envList;
    }

    public void setEnvList(List<String> envList) {
        this.envList = envList;
    }

    public List<NameGroup> getDataList() {
        return dataList;
    }

    public void setDataList(List<NameGroup> dataList) {
        this.dataList = dataList;
    }
}

xml

<extensions defaultExtensionNs="com.intellij">
    <!-- Add your extensions here -->
    <applicationService serviceImplementation="io.github.kings1990.plugin.fastrequest.config.FastRequestComponent" order="first"/>
    <applicationConfigurable displayName="Fast Request" instance="io.github.kings1990.plugin.fastrequest.view.CommonConfigurable"/>
</extensions>