RSS Feed Validation Errors

Hello! 

Does anyone know how to fix these errors in my RSS Feed after using the validation tool?

I followed the steps to create my RSS Feed for my blog, with the ultimate goal to have email automatically sent to subscribers when a new blog is posted. Easy enough!

The link directs to the right place, but here seems to be some errors after using the feed validator

Here are the results: https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Fmyhouseholdmanaged.com%2Fblog%3Fformat%3Drss#l3

• Squarespace customer support cannot help me
• My friends that know coding can't seem to find the issue
• My knowledge of coding is not enough to know if it is a fault of my own or a template issue.

I built my own site and used a service to do a website refresh. Would love to be able to fix it myself.