Null Exception error, when the app starts

[Omegaviv]

Describe the bug
When we run the app, there is a null exception error thrown

Log :

D/NetdClient( 2041): netdClientConnect netId:0, uid:10624, nid:0, addr:172.67.69.171, lan:0, localhost:0, sa_family:2, sockfd:88, thread:1.ui
E/flutter ( 2041): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: type 'Null' is not a subtype of type 'bool'
E/flutter ( 2041): #0      new ProjectAttributes.fromJson (package:mobile_app/models/projects.dart:87:24)
E/flutter ( 2041): #1      new Project.fromJson (package:mobile_app/models/projects.dart:24:39)
E/flutter ( 2041): #2      new Projects.fromJson.<anonymous closure> (package:mobile_app/models/projects.dart:8:66)
E/flutter ( 2041): #3      MappedListIterable.elementAt (dart:_internal/iterable.dart:413:31)
E/flutter ( 2041): #4      ListIterator.moveNext (dart:_internal/iterable.dart:342:26)
E/flutter ( 2041): #5      new List.from (dart:core-patch/array_patch.dart:41:17)
E/flutter ( 2041): #6      new Projects.fromJson (package:mobile_app/models/projects.dart:8:15)
E/flutter ( 2041): #7      HttpProjectsApi.getFeaturedProjects (package:mobile_app/services/API/projects_api.dart:124:23)
E/flutter ( 2041): <asynchronous suspension>
E/flutter ( 2041): #8      FeaturedProjectsViewModel.fetchFeaturedProjects (package:mobile_app/viewmodels/projects/featured_projects_viewmodel.dart:53:41)
E/flutter ( 2041): <asynchronous suspension>
E/flutter ( 2041): 

To Reproduce
Steps to reproduce the behavior:

1. Run the app in device/emulator
2. check console log

Are you working on this issue? (Yes/No)
Yes

[Omegaviv]

A potential fix could be checking the variable before assigning it, if it is Null we can set it to false.
Is this the correct way?