Updates : message handling in join-waitlist page

[wh0sumit]

Description

Fixes # (issue)

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

• [x] Test A
• [x] Test B

Development & Testing Configuration

• react version:
• react-router version:
• SCSS version:

Checklist:

• [x] My code follows the style guidelines of this project

• [x] I have performed a self-review of my own code

• [x] I have commented my code, particularly in hard-to-understand areas

• [x] My changes generate no new warnings

• [x] Any dependent changes have been merged and published in downstream modules

• [x] I have read and agree with Code of Conduct

• [x] I have read and agree with Contributing