Fix Remaining Console Warnings

[err53]

Describe the bug We're still getting a couple of warnings, thanks @NguyenDa18 for letting us know.

To Reproduce Steps to reproduce the behavior:

1. Go to the developer console, there's a couple of warnings there

Expected behavior No warnings should appear

Additional context We have the following tasks to do:

• [ ] making a 404 page
• [ ] validateDOMNesting(...): cannot appear as a descendant of .
• [ ] Warning: Each child in a list should have a unique "key" prop.
• [ ] Check the render method of DonationCard