correct error handling and added missing deleted filter

Author: chpy04

src/backend/src/services/organizations.services.ts

@@ -410,7 +410,7 @@ export default class OrganizationsService {
       throw new NotFoundException('Organization', organizationId);
     }
 
-    return organization.featuredProjects.map(projectPreviewTransformer);
+    return organization.featuredProjects.filter((p) => !p.wbsElement.dateDeleted).map(projectPreviewTransformer);
   }
 
   /**

src/frontend/src/pages/GuestProjectsPage/GuestProjectsCard.tsx

@@ -14,8 +14,8 @@ interface ProjectCardProps {
 const GuestProjectsCard: React.FC<ProjectCardProps> = ({ project }) => {
   const theme = useTheme();
   const { data: singleProject, isLoading, isError, error } = useSingleProject(project.wbsNum);
-  if (isLoading || !singleProject) return <LoadingIndicator />;
   if (isError) return <ErrorPage message={error.message} />;
+  if (isLoading || !singleProject) return <LoadingIndicator />;
 
   const activeWorkPackages = project.workPackages.filter((wp) => wp.status === WbsElementStatus.Active);