NullPointerException: Cannot invoke "com.intellij.openapi.project.Project.getService(java.lang.Class)" because "project" is null

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I have a plugin which uses jcef browser to display results  in which I  have a service level class defines as @Service(Service.Level.PROJECT) and there 

i have a field as private final Project project;

I am using the below code for get the access of above project from another class

DataContext dataContext = DataManager.getInstance().getDataContext();
 Project project = dataContext.getData(CommonDataKeys.PROJECT);

//some method

FileEditor fileEditor = FileEditorManager.getInstance(project).getSelectedEditor();

Until android studio giraffe it was working fine, but my plugin has stopped working in hedgehog

 if i open any project in project/packages format instead of android format. It is working fine if i open my project in android.  

I am getting error as project is null;

2024-01-03 09:46:48,500 [ 619260]   INFO - STDERR - java.lang.NullPointerException: Cannot invoke "com.intellij.openapi.project.Project.getService(java.lang.Class)" because "project" is null
2024-01-03 09:46:48,500 [ 619260]   INFO - STDERR - 	at com.intellij.openapi.fileEditor.FileEditorManager.getInstance(FileEditorManager.java:27)
 
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After some more investigation, i found that reloading the project the issue is resolved but still many i times when i open the project this issue occurs

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The ususal behaviour of my plugin in hedgehog is that when is send the request the response does not come as at that time the project is null but when i reload /restart the project, i start getting the reponses as now the the project is not null.(as in above code) 

FileEditor fileEditor = FileEditorManager.getInstance(project).getSelectedEditor();

Is there any way is can know that project has been loaded or not?

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