[FIX] States are optional

[adamloup-enquizit]

Description

Fixes a call to a possibly undefined value that was preventing navigation to "Add new patient"

Checklist before requesting a review

• PR focuses on a single story
• Code has been fully tested to meet acceptance criteria
• PR is reasonably small and reviewable (Generally less than 10 files and 500 changed lines)
• All new functions/classes/components reasonably small
• Functions/classes/components focused on one responsibility
• Code easy to understand and modify (clarity over concise/clever)
• PRs containing TypeScript follow the Do's and Don'ts
• PR does not contain hardcoded values (Uses constants)
• All code is covered by unit or feature tests