fix: trying to load an image from not existing folder, breaks the presentation

[saw-jan]

Description

check if the sub-folder exists and return early if not

Related Issue

• Fixes [Bug]: trying to load an image from an not existing folder, breaks the presentation #86

Motivation and Context

How Has This Been Tested?

• test environment: 🤚

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Tests only (no source changes)
• Documentation only (no source changes)
• Maintenance (e.g. dependency updates or tooling)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation updated