WordPress RSS feed fetching HTTP 404 ERROR

I am the administrator for Aspire Aviation at https://www.aspireaviation.com, an aviation news website.

We have been using the Feedburner service to help distribute our news to our subscribers.

However, since I changed my hosting plan from Windows Shared Hosting plan to the Linux Shared Hosting plan at GoDaddy, Feedburner and the Feed Validator.org both say there is an “HTTP 404 ERROR” while fetching my feed source.

Here is the Feed Validator results:
https://feedvalidator.org/check.cgi?url=https://www.aspireaviation.com/feed/

Inextricably, my site’s RSS continues to be visible and readable on a web browser, when you point the browser to the URL of my site’s feed at https://www.aspireaviation.com/feed/

While I have contacted GoDaddy’s Customer Support, they say they cannot provide any detailed support on third-party application.

Meanwhile, regarding the permission on my WordPress files, including the “wp-rss.php” and “wp-rss2.php” has been set to “Visible” and “Executable”.

Could anyone provide any help? Or do I need to remove and reinstall my WordPress system?

Reinstalling my WordPress system causes significant service disruptions and is always my last resort.

Could anyone please help?

Thanks,
Daniel,
Founder,
Aspire Aviation.
https://www.aspireaviation.com
“Aspire Aviation – where aspirations take flight”.