no message

be/app/Http/Resources/MasterTaskResource.php

@@ -24,7 +24,7 @@ class MasterTaskResource extends JsonResource
             'is_finished' => $this->is_finished,
             'starts_at' => $this->created_at,
             'deadline' => $this->deadline,
-            'project_code' => $this->project->code,
+            'project_code' => ($this->project) ? $this->project->code : null,
             'team' => ($this->team) ?: null,
             'employees' => UserResource::collection($this->usersOutsideTeam),
             'subtasks' => SubTaskResource::collection($this->subtasks),