SUGCON24 EU: Fix Null Reference Exception bug in BasicComponents

[gkLeo]

Description / Motivation

If the Data Source of Hreo rendering is empty, the rendering host will return a 500 Internal Server Error. The same issue exists with Error Message, Link, Text and Image, Venue and Video and Text renderings as well.

How Has This Been Tested?

Local

Types of changes

• [x] 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)

Checklist:

• [x] I have read the Contributing guide.
• [x] My code/comments/docs fully adhere to the Code of Conduct.
• [x] My change is a code change.
• [ ] My change is a documentation change and there are NO other updates required.