How can I fix a ERR_TOO_MANY_REDIRECTS error?

This is a known web browser issue — and more importantly — affects the Facebook crawler as well. Some web browsers (and the Facebook crawler) will follow the “official” URL listed in the webpage meta tags if it does not match the current URL.

If you’ve used a mix of upper and lower case characters in your WordPress General setting URLs, and your permalinks create lowercase URLs, this can lead to an infinite redirect condition. To fix this condition, you must use lowercase URLs in your WordPress General setting URLs.